Home / 21,233.71-29,294.35-13,679.47

Finding the Fourth Proportional to 21,233.71, 29,294.35 and 13,679.47

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Solution

The fourth proportional to 21,233.71, 29,294.35 and 13,679.47 is: 18,872.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,233.71 : 29,294.35 = 13,679.47 : x
  2. Step 2: Convert to fraction form
    21,233.71/29,294.35 = 13,679.47/x
  3. Step 3: Cross multiply
    21,233.71x = 29,294.35 × 13,679.47
  4. Step 4: Simplify right side
    21,233.71x = 400,731,181.99
  5. Step 5: Solve for x
    x = 400,731,181.99/21,233.71
  6. Step 6: Final answer
    x = 18,872.41

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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.