Home / 21,511.38-29,686.05-12,079.74

Finding the Fourth Proportional to 21,511.38, 29,686.05 and 12,079.74

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Solution

The fourth proportional to 21,511.38, 29,686.05 and 12,079.74 is: 16,670.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.38 : 29,686.05 = 12,079.74 : x
  2. Step 2: Convert to fraction form
    21,511.38/29,686.05 = 12,079.74/x
  3. Step 3: Cross multiply
    21,511.38x = 29,686.05 × 12,079.74
  4. Step 4: Simplify right side
    21,511.38x = 358,599,765.63
  5. Step 5: Solve for x
    x = 358,599,765.63/21,511.38
  6. Step 6: Final answer
    x = 16,670.24

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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.