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Finding the Fourth Proportional to 30,188.52, 45,279.90 and 9,412.20

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Solution

The fourth proportional to 30,188.52, 45,279.90 and 9,412.20 is: 14,117.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,188.52 : 45,279.90 = 9,412.20 : x
  2. Step 2: Convert to fraction form
    30,188.52/45,279.90 = 9,412.20/x
  3. Step 3: Cross multiply
    30,188.52x = 45,279.90 × 9,412.20
  4. Step 4: Simplify right side
    30,188.52x = 426,183,474.78
  5. Step 5: Solve for x
    x = 426,183,474.78/30,188.52
  6. Step 6: Final answer
    x = 14,117.40

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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.