Home / 21,968.28-30,312.94-13,349.97

Finding the Fourth Proportional to 21,968.28, 30,312.94 and 13,349.97

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Solution

The fourth proportional to 21,968.28, 30,312.94 and 13,349.97 is: 18,420.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,968.28 : 30,312.94 = 13,349.97 : x
  2. Step 2: Convert to fraction form
    21,968.28/30,312.94 = 13,349.97/x
  3. Step 3: Cross multiply
    21,968.28x = 30,312.94 × 13,349.97
  4. Step 4: Simplify right side
    21,968.28x = 404,676,839.61
  5. Step 5: Solve for x
    x = 404,676,839.61/21,968.28
  6. Step 6: Final answer
    x = 18,420.96

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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.