Home / 15,830.28-21,851.31-9,118.62

Finding the Fourth Proportional to 15,830.28, 21,851.31 and 9,118.62

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Solution

The fourth proportional to 15,830.28, 21,851.31 and 9,118.62 is: 12,586.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.28 : 21,851.31 = 9,118.62 : x
  2. Step 2: Convert to fraction form
    15,830.28/21,851.31 = 9,118.62/x
  3. Step 3: Cross multiply
    15,830.28x = 21,851.31 × 9,118.62
  4. Step 4: Simplify right side
    15,830.28x = 199,253,792.39
  5. Step 5: Solve for x
    x = 199,253,792.39/15,830.28
  6. Step 6: Final answer
    x = 12,586.88

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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.