Home / 15,715.22-21,686.82-8,641.22

Finding the Fourth Proportional to 15,715.22, 21,686.82 and 8,641.22

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Solution

The fourth proportional to 15,715.22, 21,686.82 and 8,641.22 is: 11,924.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.22 : 21,686.82 = 8,641.22 : x
  2. Step 2: Convert to fraction form
    15,715.22/21,686.82 = 8,641.22/x
  3. Step 3: Cross multiply
    15,715.22x = 21,686.82 × 8,641.22
  4. Step 4: Simplify right side
    15,715.22x = 187,400,582.72
  5. Step 5: Solve for x
    x = 187,400,582.72/15,715.22
  6. Step 6: Final answer
    x = 11,924.78

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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.