Home / 15,388.66-21,231.63-9,414.10

Finding the Fourth Proportional to 15,388.66, 21,231.63 and 9,414.10

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Solution

The fourth proportional to 15,388.66, 21,231.63 and 9,414.10 is: 12,988.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.66 : 21,231.63 = 9,414.10 : x
  2. Step 2: Convert to fraction form
    15,388.66/21,231.63 = 9,414.10/x
  3. Step 3: Cross multiply
    15,388.66x = 21,231.63 × 9,414.10
  4. Step 4: Simplify right side
    15,388.66x = 199,876,687.98
  5. Step 5: Solve for x
    x = 199,876,687.98/15,388.66
  6. Step 6: Final answer
    x = 12,988.57

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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.