Home / 13,621.50-20,432.25-4,387.50

Finding the Fourth Proportional to 13,621.50, 20,432.25 and 4,387.50

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Solution

The fourth proportional to 13,621.50, 20,432.25 and 4,387.50 is: 6,581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.50 : 20,432.25 = 4,387.50 : x
  2. Step 2: Convert to fraction form
    13,621.50/20,432.25 = 4,387.50/x
  3. Step 3: Cross multiply
    13,621.50x = 20,432.25 × 4,387.50
  4. Step 4: Simplify right side
    13,621.50x = 89,646,496.88
  5. Step 5: Solve for x
    x = 89,646,496.88/13,621.50
  6. Step 6: Final answer
    x = 6,581.25

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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.