Home / 21,315.28-29,416-12,360.96

Finding the Fourth Proportional to 21,315.28, 29,416 and 12,360.96

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Solution

The fourth proportional to 21,315.28, 29,416 and 12,360.96 is: 17,058.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.28 : 29,416 = 12,360.96 : x
  2. Step 2: Convert to fraction form
    21,315.28/29,416 = 12,360.96/x
  3. Step 3: Cross multiply
    21,315.28x = 29,416 × 12,360.96
  4. Step 4: Simplify right side
    21,315.28x = 363,609,999.36
  5. Step 5: Solve for x
    x = 363,609,999.36/21,315.28
  6. Step 6: Final answer
    x = 17,058.65

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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.