Home / 21,312.46-29,398.20-14,142.76

Finding the Fourth Proportional to 21,312.46, 29,398.20 and 14,142.76

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Solution

The fourth proportional to 21,312.46, 29,398.20 and 14,142.76 is: 19,508.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.46 : 29,398.20 = 14,142.76 : x
  2. Step 2: Convert to fraction form
    21,312.46/29,398.20 = 14,142.76/x
  3. Step 3: Cross multiply
    21,312.46x = 29,398.20 × 14,142.76
  4. Step 4: Simplify right side
    21,312.46x = 415,771,687.03
  5. Step 5: Solve for x
    x = 415,771,687.03/21,312.46
  6. Step 6: Final answer
    x = 19,508.39

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Half scale
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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.