Home / 21,618.18-29,833.38-12,186.95

Finding the Fourth Proportional to 21,618.18, 29,833.38 and 12,186.95

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Solution

The fourth proportional to 21,618.18, 29,833.38 and 12,186.95 is: 16,818.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.18 : 29,833.38 = 12,186.95 : x
  2. Step 2: Convert to fraction form
    21,618.18/29,833.38 = 12,186.95/x
  3. Step 3: Cross multiply
    21,618.18x = 29,833.38 × 12,186.95
  4. Step 4: Simplify right side
    21,618.18x = 363,577,761.22
  5. Step 5: Solve for x
    x = 363,577,761.22/21,618.18
  6. Step 6: Final answer
    x = 16,818.15

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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.