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Finding the Fourth Proportional to 18,714.71, 25,825.20 and 10,215.15

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Solution

The fourth proportional to 18,714.71, 25,825.20 and 10,215.15 is: 14,096.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.71 : 25,825.20 = 10,215.15 : x
  2. Step 2: Convert to fraction form
    18,714.71/25,825.20 = 10,215.15/x
  3. Step 3: Cross multiply
    18,714.71x = 25,825.20 × 10,215.15
  4. Step 4: Simplify right side
    18,714.71x = 263,808,291.78
  5. Step 5: Solve for x
    x = 263,808,291.78/18,714.71
  6. Step 6: Final answer
    x = 14,096.31

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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.