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Finding the Fourth Proportional to 18,718.55, 25,810.62 and 12,753.71

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Solution

The fourth proportional to 18,718.55, 25,810.62 and 12,753.71 is: 17,585.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.55 : 25,810.62 = 12,753.71 : x
  2. Step 2: Convert to fraction form
    18,718.55/25,810.62 = 12,753.71/x
  3. Step 3: Cross multiply
    18,718.55x = 25,810.62 × 12,753.71
  4. Step 4: Simplify right side
    18,718.55x = 329,181,162.40
  5. Step 5: Solve for x
    x = 329,181,162.40/18,718.55
  6. Step 6: Final answer
    x = 17,585.83

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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.