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Finding the Fourth Proportional to 18,701.52, 25,808.40 and 10,318.08

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Solution

The fourth proportional to 18,701.52, 25,808.40 and 10,318.08 is: 14,239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.52 : 25,808.40 = 10,318.08 : x
  2. Step 2: Convert to fraction form
    18,701.52/25,808.40 = 10,318.08/x
  3. Step 3: Cross multiply
    18,701.52x = 25,808.40 × 10,318.08
  4. Step 4: Simplify right side
    18,701.52x = 266,293,135.87
  5. Step 5: Solve for x
    x = 266,293,135.87/18,701.52
  6. Step 6: Final answer
    x = 14,239.12

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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.