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Finding the Fourth Proportional to 18,640.98, 25,711.08 and 10,680.30

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Solution

The fourth proportional to 18,640.98, 25,711.08 and 10,680.30 is: 14,731.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.98 : 25,711.08 = 10,680.30 : x
  2. Step 2: Convert to fraction form
    18,640.98/25,711.08 = 10,680.30/x
  3. Step 3: Cross multiply
    18,640.98x = 25,711.08 × 10,680.30
  4. Step 4: Simplify right side
    18,640.98x = 274,602,047.72
  5. Step 5: Solve for x
    x = 274,602,047.72/18,640.98
  6. Step 6: Final answer
    x = 14,731.10

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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.