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Finding the Fourth Proportional to 30,086.32, 45,129.68 and 7,899.52

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Solution

The fourth proportional to 30,086.32, 45,129.68 and 7,899.52 is: 11,849.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,086.32 : 45,129.68 = 7,899.52 : x
  2. Step 2: Convert to fraction form
    30,086.32/45,129.68 = 7,899.52/x
  3. Step 3: Cross multiply
    30,086.32x = 45,129.68 × 7,899.52
  4. Step 4: Simplify right side
    30,086.32x = 356,502,809.75
  5. Step 5: Solve for x
    x = 356,502,809.75/30,086.32
  6. Step 6: Final answer
    x = 11,849.33

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Similar ratio
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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.