Home / 30,387.20-45,561.02-12,612.96

Finding the Fourth Proportional to 30,387.20, 45,561.02 and 12,612.96

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Solution

The fourth proportional to 30,387.20, 45,561.02 and 12,612.96 is: 18,911.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.20 : 45,561.02 = 12,612.96 : x
  2. Step 2: Convert to fraction form
    30,387.20/45,561.02 = 12,612.96/x
  3. Step 3: Cross multiply
    30,387.20x = 45,561.02 × 12,612.96
  4. Step 4: Simplify right side
    30,387.20x = 574,659,259.75
  5. Step 5: Solve for x
    x = 574,659,259.75/30,387.20
  6. Step 6: Final answer
    x = 18,911.23

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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.