Home / 21,227.61-29,286.12-13,157.58

Finding the Fourth Proportional to 21,227.61, 29,286.12 and 13,157.58

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Solution

The fourth proportional to 21,227.61, 29,286.12 and 13,157.58 is: 18,152.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227.61 : 29,286.12 = 13,157.58 : x
  2. Step 2: Convert to fraction form
    21,227.61/29,286.12 = 13,157.58/x
  3. Step 3: Cross multiply
    21,227.61x = 29,286.12 × 13,157.58
  4. Step 4: Simplify right side
    21,227.61x = 385,334,466.79
  5. Step 5: Solve for x
    x = 385,334,466.79/21,227.61
  6. Step 6: Final answer
    x = 18,152.51

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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.