Home / 15,911.97-21,959.24-9,539.61

Finding the Fourth Proportional to 15,911.97, 21,959.24 and 9,539.61

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Solution

The fourth proportional to 15,911.97, 21,959.24 and 9,539.61 is: 13,165.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.97 : 21,959.24 = 9,539.61 : x
  2. Step 2: Convert to fraction form
    15,911.97/21,959.24 = 9,539.61/x
  3. Step 3: Cross multiply
    15,911.97x = 21,959.24 × 9,539.61
  4. Step 4: Simplify right side
    15,911.97x = 209,482,537.80
  5. Step 5: Solve for x
    x = 209,482,537.80/15,911.97
  6. Step 6: Final answer
    x = 13,165.09

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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.