Home / 15,689.22-21,651.28-8,615.79

Finding the Fourth Proportional to 15,689.22, 21,651.28 and 8,615.79

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Solution

The fourth proportional to 15,689.22, 21,651.28 and 8,615.79 is: 11,889.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.22 : 21,651.28 = 8,615.79 : x
  2. Step 2: Convert to fraction form
    15,689.22/21,651.28 = 8,615.79/x
  3. Step 3: Cross multiply
    15,689.22x = 21,651.28 × 8,615.79
  4. Step 4: Simplify right side
    15,689.22x = 186,542,892.76
  5. Step 5: Solve for x
    x = 186,542,892.76/15,689.22
  6. Step 6: Final answer
    x = 11,889.88

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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.