Home / 8,921.40-13,390.32-4,542

Finding the Fourth Proportional to 8,921.40, 13,390.32 and 4,542

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Solution

The fourth proportional to 8,921.40, 13,390.32 and 4,542 is: 6,817.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.40 : 13,390.32 = 4,542 : x
  2. Step 2: Convert to fraction form
    8,921.40/13,390.32 = 4,542/x
  3. Step 3: Cross multiply
    8,921.40x = 13,390.32 × 4,542
  4. Step 4: Simplify right side
    8,921.40x = 60,818,833.44
  5. Step 5: Solve for x
    x = 60,818,833.44/8,921.40
  6. Step 6: Final answer
    x = 6,817.18

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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.