Home / 15,686.46-21,647.24-8,612.82

Finding the Fourth Proportional to 15,686.46, 21,647.24 and 8,612.82

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Solution

The fourth proportional to 15,686.46, 21,647.24 and 8,612.82 is: 11,885.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.46 : 21,647.24 = 8,612.82 : x
  2. Step 2: Convert to fraction form
    15,686.46/21,647.24 = 8,612.82/x
  3. Step 3: Cross multiply
    15,686.46x = 21,647.24 × 8,612.82
  4. Step 4: Simplify right side
    15,686.46x = 186,443,781.62
  5. Step 5: Solve for x
    x = 186,443,781.62/15,686.46
  6. Step 6: Final answer
    x = 11,885.65

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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.