Home / 21,957.53-30,318.85-20,278.32

Finding the Fourth Proportional to 21,957.53, 30,318.85 and 20,278.32

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Solution

The fourth proportional to 21,957.53, 30,318.85 and 20,278.32 is: 28,000.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.53 : 30,318.85 = 20,278.32 : x
  2. Step 2: Convert to fraction form
    21,957.53/30,318.85 = 20,278.32/x
  3. Step 3: Cross multiply
    21,957.53x = 30,318.85 × 20,278.32
  4. Step 4: Simplify right side
    21,957.53x = 614,815,190.74
  5. Step 5: Solve for x
    x = 614,815,190.74/21,957.53
  6. Step 6: Final answer
    x = 28,000.20

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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.