Home / 20,932.71-28,887-11,372.67

Finding the Fourth Proportional to 20,932.71, 28,887 and 11,372.67

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Solution

The fourth proportional to 20,932.71, 28,887 and 11,372.67 is: 15,694.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.71 : 28,887 = 11,372.67 : x
  2. Step 2: Convert to fraction form
    20,932.71/28,887 = 11,372.67/x
  3. Step 3: Cross multiply
    20,932.71x = 28,887 × 11,372.67
  4. Step 4: Simplify right side
    20,932.71x = 328,522,318.29
  5. Step 5: Solve for x
    x = 328,522,318.29/20,932.71
  6. Step 6: Final answer
    x = 15,694.21

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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.