Home / 15,717.08-21,689.13-8,643.50

Finding the Fourth Proportional to 15,717.08, 21,689.13 and 8,643.50

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Solution

The fourth proportional to 15,717.08, 21,689.13 and 8,643.50 is: 11,927.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.08 : 21,689.13 = 8,643.50 : x
  2. Step 2: Convert to fraction form
    15,717.08/21,689.13 = 8,643.50/x
  3. Step 3: Cross multiply
    15,717.08x = 21,689.13 × 8,643.50
  4. Step 4: Simplify right side
    15,717.08x = 187,469,943.58
  5. Step 5: Solve for x
    x = 187,469,943.58/15,717.08
  6. Step 6: Final answer
    x = 11,927.79

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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.