Home / 28,472.28-39,291.12-15,724.68

Finding the Fourth Proportional to 28,472.28, 39,291.12 and 15,724.68

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Solution

The fourth proportional to 28,472.28, 39,291.12 and 15,724.68 is: 21,699.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,472.28 : 39,291.12 = 15,724.68 : x
  2. Step 2: Convert to fraction form
    28,472.28/39,291.12 = 15,724.68/x
  3. Step 3: Cross multiply
    28,472.28x = 39,291.12 × 15,724.68
  4. Step 4: Simplify right side
    28,472.28x = 617,840,288.84
  5. Step 5: Solve for x
    x = 617,840,288.84/28,472.28
  6. Step 6: Final answer
    x = 21,699.71

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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.