Home / 28,387.61-42,581.20-7,325.86

Finding the Fourth Proportional to 28,387.61, 42,581.20 and 7,325.86

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Solution

The fourth proportional to 28,387.61, 42,581.20 and 7,325.86 is: 10,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.61 : 42,581.20 = 7,325.86 : x
  2. Step 2: Convert to fraction form
    28,387.61/42,581.20 = 7,325.86/x
  3. Step 3: Cross multiply
    28,387.61x = 42,581.20 × 7,325.86
  4. Step 4: Simplify right side
    28,387.61x = 311,943,909.83
  5. Step 5: Solve for x
    x = 311,943,909.83/28,387.61
  6. Step 6: Final answer
    x = 10,988.73

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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.