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Finding the Fourth Proportional to 30,187.52, 45,278.40 and 9,411.20

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Solution

The fourth proportional to 30,187.52, 45,278.40 and 9,411.20 is: 14,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,187.52 : 45,278.40 = 9,411.20 : x
  2. Step 2: Convert to fraction form
    30,187.52/45,278.40 = 9,411.20/x
  3. Step 3: Cross multiply
    30,187.52x = 45,278.40 × 9,411.20
  4. Step 4: Simplify right side
    30,187.52x = 426,124,078.08
  5. Step 5: Solve for x
    x = 426,124,078.08/30,187.52
  6. Step 6: Final answer
    x = 14,115.90

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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.