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Finding the Fourth Proportional to 18,103, 24,981.32 and 10,145.16

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Solution

The fourth proportional to 18,103, 24,981.32 and 10,145.16 is: 13,999.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,103 : 24,981.32 = 10,145.16 : x
  2. Step 2: Convert to fraction form
    18,103/24,981.32 = 10,145.16/x
  3. Step 3: Cross multiply
    18,103x = 24,981.32 × 10,145.16
  4. Step 4: Simplify right side
    18,103x = 253,439,488.41
  5. Step 5: Solve for x
    x = 253,439,488.41/18,103
  6. Step 6: Final answer
    x = 13,999.86

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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.