Home / 19,965,129.60-29,932,948.80-7,991,702.40

Finding the Fourth Proportional to 19,965,129.60, 29,932,948.80 and 7,991,702.40

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Solution

The fourth proportional to 19,965,129.60, 29,932,948.80 and 7,991,702.40 is: 11,981,651.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,965,129.60 : 29,932,948.80 = 7,991,702.40 : x
  2. Step 2: Convert to fraction form
    19,965,129.60/29,932,948.80 = 7,991,702.40/x
  3. Step 3: Cross multiply
    19,965,129.60x = 29,932,948.80 × 7,991,702.40
  4. Step 4: Simplify right side
    19,965,129.60x = 239,215,218,764,037.12
  5. Step 5: Solve for x
    x = 239,215,218,764,037.12/19,965,129.60
  6. Step 6: Final answer
    x = 11,981,651.19

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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.