Home / 8,972.40-13,456.80-3,421.92

Finding the Fourth Proportional to 8,972.40, 13,456.80 and 3,421.92

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Solution

The fourth proportional to 8,972.40, 13,456.80 and 3,421.92 is: 5,132.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.40 : 13,456.80 = 3,421.92 : x
  2. Step 2: Convert to fraction form
    8,972.40/13,456.80 = 3,421.92/x
  3. Step 3: Cross multiply
    8,972.40x = 13,456.80 × 3,421.92
  4. Step 4: Simplify right side
    8,972.40x = 46,048,093.06
  5. Step 5: Solve for x
    x = 46,048,093.06/8,972.40
  6. Step 6: Final answer
    x = 5,132.19

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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.