Home / 15,763.34-21,753.45-8,689.61

Finding the Fourth Proportional to 15,763.34, 21,753.45 and 8,689.61

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Solution

The fourth proportional to 15,763.34, 21,753.45 and 8,689.61 is: 11,991.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.34 : 21,753.45 = 8,689.61 : x
  2. Step 2: Convert to fraction form
    15,763.34/21,753.45 = 8,689.61/x
  3. Step 3: Cross multiply
    15,763.34x = 21,753.45 × 8,689.61
  4. Step 4: Simplify right side
    15,763.34x = 189,028,887.89
  5. Step 5: Solve for x
    x = 189,028,887.89/15,763.34
  6. Step 6: Final answer
    x = 11,991.68

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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.