Home / 20,491.64-28,278.15-11,539.12

Finding the Fourth Proportional to 20,491.64, 28,278.15 and 11,539.12

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Solution

The fourth proportional to 20,491.64, 28,278.15 and 11,539.12 is: 15,923.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.64 : 28,278.15 = 11,539.12 : x
  2. Step 2: Convert to fraction form
    20,491.64/28,278.15 = 11,539.12/x
  3. Step 3: Cross multiply
    20,491.64x = 28,278.15 × 11,539.12
  4. Step 4: Simplify right side
    20,491.64x = 326,304,966.23
  5. Step 5: Solve for x
    x = 326,304,966.23/20,491.64
  6. Step 6: Final answer
    x = 15,923.81

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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.