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Finding the Fourth Proportional to 30,125.71, 45,158.49 and 10,391.68

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Solution

The fourth proportional to 30,125.71, 45,158.49 and 10,391.68 is: 15,577.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,125.71 : 45,158.49 = 10,391.68 : x
  2. Step 2: Convert to fraction form
    30,125.71/45,158.49 = 10,391.68/x
  3. Step 3: Cross multiply
    30,125.71x = 45,158.49 × 10,391.68
  4. Step 4: Simplify right side
    30,125.71x = 469,272,577.36
  5. Step 5: Solve for x
    x = 469,272,577.36/30,125.71
  6. Step 6: Final answer
    x = 15,577.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.