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Finding the Fourth Proportional to 15,498.84, 21,388.56 and 8,425.42

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Solution

The fourth proportional to 15,498.84, 21,388.56 and 8,425.42 is: 11,627.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,498.84 : 21,388.56 = 8,425.42 : x
  2. Step 2: Convert to fraction form
    15,498.84/21,388.56 = 8,425.42/x
  3. Step 3: Cross multiply
    15,498.84x = 21,388.56 × 8,425.42
  4. Step 4: Simplify right side
    15,498.84x = 180,207,516.13
  5. Step 5: Solve for x
    x = 180,207,516.13/15,498.84
  6. Step 6: Final answer
    x = 11,627.16

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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.