Home / 30,929.92-42,669.12-18,350.08

Finding the Fourth Proportional to 30,929.92, 42,669.12 and 18,350.08

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Solution

The fourth proportional to 30,929.92, 42,669.12 and 18,350.08 is: 25,314.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,929.92 : 42,669.12 = 18,350.08 : x
  2. Step 2: Convert to fraction form
    30,929.92/42,669.12 = 18,350.08/x
  3. Step 3: Cross multiply
    30,929.92x = 42,669.12 × 18,350.08
  4. Step 4: Simplify right side
    30,929.92x = 782,981,765.53
  5. Step 5: Solve for x
    x = 782,981,765.53/30,929.92
  6. Step 6: Final answer
    x = 25,314.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.