Home / 21,312.72-29,401.92-13,350.96

Finding the Fourth Proportional to 21,312.72, 29,401.92 and 13,350.96

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Solution

The fourth proportional to 21,312.72, 29,401.92 and 13,350.96 is: 18,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.72 : 29,401.92 = 13,350.96 : x
  2. Step 2: Convert to fraction form
    21,312.72/29,401.92 = 13,350.96/x
  3. Step 3: Cross multiply
    21,312.72x = 29,401.92 × 13,350.96
  4. Step 4: Simplify right side
    21,312.72x = 392,543,857.84
  5. Step 5: Solve for x
    x = 392,543,857.84/21,312.72
  6. Step 6: Final answer
    x = 18,418.29

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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.