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Finding the Fourth Proportional to 8,615.71, 11,897.99 and 7,425.42

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Solution

The fourth proportional to 8,615.71, 11,897.99 and 7,425.42 is: 10,254.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.71 : 11,897.99 = 7,425.42 : x
  2. Step 2: Convert to fraction form
    8,615.71/11,897.99 = 7,425.42/x
  3. Step 3: Cross multiply
    8,615.71x = 11,897.99 × 7,425.42
  4. Step 4: Simplify right side
    8,615.71x = 88,347,476.29
  5. Step 5: Solve for x
    x = 88,347,476.29/8,615.71
  6. Step 6: Final answer
    x = 10,254.23

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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.