Home / 20,972.17-28,947.27-12,365.86

Finding the Fourth Proportional to 20,972.17, 28,947.27 and 12,365.86

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Solution

The fourth proportional to 20,972.17, 28,947.27 and 12,365.86 is: 17,068.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.17 : 28,947.27 = 12,365.86 : x
  2. Step 2: Convert to fraction form
    20,972.17/28,947.27 = 12,365.86/x
  3. Step 3: Cross multiply
    20,972.17x = 28,947.27 × 12,365.86
  4. Step 4: Simplify right side
    20,972.17x = 357,957,888.20
  5. Step 5: Solve for x
    x = 357,957,888.20/20,972.17
  6. Step 6: Final answer
    x = 17,068.23

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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.