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Finding the Fourth Proportional to 18,489.70, 25,514.94 and 10,531.72

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Solution

The fourth proportional to 18,489.70, 25,514.94 and 10,531.72 is: 14,533.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.70 : 25,514.94 = 10,531.72 : x
  2. Step 2: Convert to fraction form
    18,489.70/25,514.94 = 10,531.72/x
  3. Step 3: Cross multiply
    18,489.70x = 25,514.94 × 10,531.72
  4. Step 4: Simplify right side
    18,489.70x = 268,716,203.90
  5. Step 5: Solve for x
    x = 268,716,203.90/18,489.70
  6. Step 6: Final answer
    x = 14,533.29

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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.