Home / 15,387.66-21,229.67-9,339.80

Finding the Fourth Proportional to 15,387.66, 21,229.67 and 9,339.80

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Solution

The fourth proportional to 15,387.66, 21,229.67 and 9,339.80 is: 12,885.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.66 : 21,229.67 = 9,339.80 : x
  2. Step 2: Convert to fraction form
    15,387.66/21,229.67 = 9,339.80/x
  3. Step 3: Cross multiply
    15,387.66x = 21,229.67 × 9,339.80
  4. Step 4: Simplify right side
    15,387.66x = 198,280,878.24
  5. Step 5: Solve for x
    x = 198,280,878.24/15,387.66
  6. Step 6: Final answer
    x = 12,885.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.