Home / 21,526.26-29,705.86-13,142.76

Finding the Fourth Proportional to 21,526.26, 29,705.86 and 13,142.76

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Solution

The fourth proportional to 21,526.26, 29,705.86 and 13,142.76 is: 18,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,526.26 : 29,705.86 = 13,142.76 : x
  2. Step 2: Convert to fraction form
    21,526.26/29,705.86 = 13,142.76/x
  3. Step 3: Cross multiply
    21,526.26x = 29,705.86 × 13,142.76
  4. Step 4: Simplify right side
    21,526.26x = 390,416,988.57
  5. Step 5: Solve for x
    x = 390,416,988.57/21,526.26
  6. Step 6: Final answer
    x = 18,136.78

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Half scale
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Double scale
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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.