Home / 13,146,785.70-19,720,178.55-7,478,081.70

Finding the Fourth Proportional to 13,146,785.70, 19,720,178.55 and 7,478,081.70

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Solution

The fourth proportional to 13,146,785.70, 19,720,178.55 and 7,478,081.70 is: 11,217,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146,785.70 : 19,720,178.55 = 7,478,081.70 : x
  2. Step 2: Convert to fraction form
    13,146,785.70/19,720,178.55 = 7,478,081.70/x
  3. Step 3: Cross multiply
    13,146,785.70x = 19,720,178.55 × 7,478,081.70
  4. Step 4: Simplify right side
    13,146,785.70x = 147,469,106,335,487.53
  5. Step 5: Solve for x
    x = 147,469,106,335,487.53/13,146,785.70
  6. Step 6: Final answer
    x = 11,217,122.55

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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.