Home / 21,149.76-29,186.80-11,718.92

Finding the Fourth Proportional to 21,149.76, 29,186.80 and 11,718.92

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Solution

The fourth proportional to 21,149.76, 29,186.80 and 11,718.92 is: 16,172.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.76 : 29,186.80 = 11,718.92 : x
  2. Step 2: Convert to fraction form
    21,149.76/29,186.80 = 11,718.92/x
  3. Step 3: Cross multiply
    21,149.76x = 29,186.80 × 11,718.92
  4. Step 4: Simplify right side
    21,149.76x = 342,037,774.26
  5. Step 5: Solve for x
    x = 342,037,774.26/21,149.76
  6. Step 6: Final answer
    x = 16,172.18

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Double scale
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Similar ratio
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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.