Home / 15,634.91-21,576.20-8,561.78

Finding the Fourth Proportional to 15,634.91, 21,576.20 and 8,561.78

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Solution

The fourth proportional to 15,634.91, 21,576.20 and 8,561.78 is: 11,815.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,634.91 : 21,576.20 = 8,561.78 : x
  2. Step 2: Convert to fraction form
    15,634.91/21,576.20 = 8,561.78/x
  3. Step 3: Cross multiply
    15,634.91x = 21,576.20 × 8,561.78
  4. Step 4: Simplify right side
    15,634.91x = 184,730,526.95
  5. Step 5: Solve for x
    x = 184,730,526.95/15,634.91
  6. Step 6: Final answer
    x = 11,815.26

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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.