Home / 12,379,856.70-18,569,785.05-9,191,210.70

Finding the Fourth Proportional to 12,379,856.70, 18,569,785.05 and 9,191,210.70

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Solution

The fourth proportional to 12,379,856.70, 18,569,785.05 and 9,191,210.70 is: 13,786,816.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379,856.70 : 18,569,785.05 = 9,191,210.70 : x
  2. Step 2: Convert to fraction form
    12,379,856.70/18,569,785.05 = 9,191,210.70/x
  3. Step 3: Cross multiply
    12,379,856.70x = 18,569,785.05 × 9,191,210.70
  4. Step 4: Simplify right side
    12,379,856.70x = 170,678,807,048,260.03
  5. Step 5: Solve for x
    x = 170,678,807,048,260.03/12,379,856.70
  6. Step 6: Final answer
    x = 13,786,816.05

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.