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Finding the Fourth Proportional to 13,902.80, 20,737.06 and 12,935.12

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Solution

The fourth proportional to 13,902.80, 20,737.06 and 12,935.12 is: 19,293.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,902.80 : 20,737.06 = 12,935.12 : x
  2. Step 2: Convert to fraction form
    13,902.80/20,737.06 = 12,935.12/x
  3. Step 3: Cross multiply
    13,902.80x = 20,737.06 × 12,935.12
  4. Step 4: Simplify right side
    13,902.80x = 268,236,359.55
  5. Step 5: Solve for x
    x = 268,236,359.55/13,902.80
  6. Step 6: Final answer
    x = 19,293.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.