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Finding the Fourth Proportional to 16,405.80, 24,608.70 and 13,781.40

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Solution

The fourth proportional to 16,405.80, 24,608.70 and 13,781.40 is: 20,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,405.80 : 24,608.70 = 13,781.40 : x
  2. Step 2: Convert to fraction form
    16,405.80/24,608.70 = 13,781.40/x
  3. Step 3: Cross multiply
    16,405.80x = 24,608.70 × 13,781.40
  4. Step 4: Simplify right side
    16,405.80x = 339,142,338.18
  5. Step 5: Solve for x
    x = 339,142,338.18/16,405.80
  6. Step 6: Final answer
    x = 20,672.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.