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Finding the Fourth Proportional to 18,419.76, 25,411.16 and 12,449.26

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Solution

The fourth proportional to 18,419.76, 25,411.16 and 12,449.26 is: 17,174.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.76 : 25,411.16 = 12,449.26 : x
  2. Step 2: Convert to fraction form
    18,419.76/25,411.16 = 12,449.26/x
  3. Step 3: Cross multiply
    18,419.76x = 25,411.16 × 12,449.26
  4. Step 4: Simplify right side
    18,419.76x = 316,350,137.74
  5. Step 5: Solve for x
    x = 316,350,137.74/18,419.76
  6. Step 6: Final answer
    x = 17,174.50

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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.