Home / 8,972.15-13,458.13-3,128.75

Finding the Fourth Proportional to 8,972.15, 13,458.13 and 3,128.75

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Solution

The fourth proportional to 8,972.15, 13,458.13 and 3,128.75 is: 4,693.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.15 : 13,458.13 = 3,128.75 : x
  2. Step 2: Convert to fraction form
    8,972.15/13,458.13 = 3,128.75/x
  3. Step 3: Cross multiply
    8,972.15x = 13,458.13 × 3,128.75
  4. Step 4: Simplify right side
    8,972.15x = 42,107,124.24
  5. Step 5: Solve for x
    x = 42,107,124.24/8,972.15
  6. Step 6: Final answer
    x = 4,693.09

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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.