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Finding the Fourth Proportional to 14,294.78, 19,726.22 and 7,921.46

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Solution

The fourth proportional to 14,294.78, 19,726.22 and 7,921.46 is: 10,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,294.78 : 19,726.22 = 7,921.46 : x
  2. Step 2: Convert to fraction form
    14,294.78/19,726.22 = 7,921.46/x
  3. Step 3: Cross multiply
    14,294.78x = 19,726.22 × 7,921.46
  4. Step 4: Simplify right side
    14,294.78x = 156,260,531.80
  5. Step 5: Solve for x
    x = 156,260,531.80/14,294.78
  6. Step 6: Final answer
    x = 10,931.30

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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.