Home / 9,387.90-12,956.46-5,355.72

Finding the Fourth Proportional to 9,387.90, 12,956.46 and 5,355.72

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Solution

The fourth proportional to 9,387.90, 12,956.46 and 5,355.72 is: 7,391.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387.90 : 12,956.46 = 5,355.72 : x
  2. Step 2: Convert to fraction form
    9,387.90/12,956.46 = 5,355.72/x
  3. Step 3: Cross multiply
    9,387.90x = 12,956.46 × 5,355.72
  4. Step 4: Simplify right side
    9,387.90x = 69,391,171.95
  5. Step 5: Solve for x
    x = 69,391,171.95/9,387.90
  6. Step 6: Final answer
    x = 7,391.55

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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.