Home / 28,920.38-39,908.45-15,998.87

Finding the Fourth Proportional to 28,920.38, 39,908.45 and 15,998.87

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Solution

The fourth proportional to 28,920.38, 39,908.45 and 15,998.87 is: 22,077.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.38 : 39,908.45 = 15,998.87 : x
  2. Step 2: Convert to fraction form
    28,920.38/39,908.45 = 15,998.87/x
  3. Step 3: Cross multiply
    28,920.38x = 39,908.45 × 15,998.87
  4. Step 4: Simplify right side
    28,920.38x = 638,490,023.46
  5. Step 5: Solve for x
    x = 638,490,023.46/28,920.38
  6. Step 6: Final answer
    x = 22,077.52

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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.