Home / 12,544.92-18,828.72-6,990.12

Finding the Fourth Proportional to 12,544.92, 18,828.72 and 6,990.12

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Solution

The fourth proportional to 12,544.92, 18,828.72 and 6,990.12 is: 10,491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,544.92 : 18,828.72 = 6,990.12 : x
  2. Step 2: Convert to fraction form
    12,544.92/18,828.72 = 6,990.12/x
  3. Step 3: Cross multiply
    12,544.92x = 18,828.72 × 6,990.12
  4. Step 4: Simplify right side
    12,544.92x = 131,615,012.25
  5. Step 5: Solve for x
    x = 131,615,012.25/12,544.92
  6. Step 6: Final answer
    x = 10,491.50

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Half scale
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Double scale
Find fourth proportional to 12,545.92, 18,830.22 and 6,991.12
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.