Home / 21,511.56-29,685.98-12,080.20

Finding the Fourth Proportional to 21,511.56, 29,685.98 and 12,080.20

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Solution

The fourth proportional to 21,511.56, 29,685.98 and 12,080.20 is: 16,670.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.56 : 29,685.98 = 12,080.20 : x
  2. Step 2: Convert to fraction form
    21,511.56/29,685.98 = 12,080.20/x
  3. Step 3: Cross multiply
    21,511.56x = 29,685.98 × 12,080.20
  4. Step 4: Simplify right side
    21,511.56x = 358,612,575.60
  5. Step 5: Solve for x
    x = 358,612,575.60/21,511.56
  6. Step 6: Final answer
    x = 16,670.69

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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.