Home / 20,864.17-28,777.30-15,200.65

Finding the Fourth Proportional to 20,864.17, 28,777.30 and 15,200.65

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Solution

The fourth proportional to 20,864.17, 28,777.30 and 15,200.65 is: 20,965.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.17 : 28,777.30 = 15,200.65 : x
  2. Step 2: Convert to fraction form
    20,864.17/28,777.30 = 15,200.65/x
  3. Step 3: Cross multiply
    20,864.17x = 28,777.30 × 15,200.65
  4. Step 4: Simplify right side
    20,864.17x = 437,433,665.25
  5. Step 5: Solve for x
    x = 437,433,665.25/20,864.17
  6. Step 6: Final answer
    x = 20,965.78

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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.