Home / 42,971.20-64,456.79-13,391.41

Finding the Fourth Proportional to 42,971.20, 64,456.79 and 13,391.41

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Solution

The fourth proportional to 42,971.20, 64,456.79 and 13,391.41 is: 20,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,971.20 : 64,456.79 = 13,391.41 : x
  2. Step 2: Convert to fraction form
    42,971.20/64,456.79 = 13,391.41/x
  3. Step 3: Cross multiply
    42,971.20x = 64,456.79 × 13,391.41
  4. Step 4: Simplify right side
    42,971.20x = 863,167,302.17
  5. Step 5: Solve for x
    x = 863,167,302.17/42,971.20
  6. Step 6: Final answer
    x = 20,087.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.