Home / 21,428.88-29,571.85-13,045.38

Finding the Fourth Proportional to 21,428.88, 29,571.85 and 13,045.38

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Solution

The fourth proportional to 21,428.88, 29,571.85 and 13,045.38 is: 18,002.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.88 : 29,571.85 = 13,045.38 : x
  2. Step 2: Convert to fraction form
    21,428.88/29,571.85 = 13,045.38/x
  3. Step 3: Cross multiply
    21,428.88x = 29,571.85 × 13,045.38
  4. Step 4: Simplify right side
    21,428.88x = 385,776,020.55
  5. Step 5: Solve for x
    x = 385,776,020.55/21,428.88
  6. Step 6: Final answer
    x = 18,002.62

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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.