Home / 9,378.72-12,942.88-5,187.04

Finding the Fourth Proportional to 9,378.72, 12,942.88 and 5,187.04

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Solution

The fourth proportional to 9,378.72, 12,942.88 and 5,187.04 is: 7,158.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.72 : 12,942.88 = 5,187.04 : x
  2. Step 2: Convert to fraction form
    9,378.72/12,942.88 = 5,187.04/x
  3. Step 3: Cross multiply
    9,378.72x = 12,942.88 × 5,187.04
  4. Step 4: Simplify right side
    9,378.72x = 67,135,236.28
  5. Step 5: Solve for x
    x = 67,135,236.28/9,378.72
  6. Step 6: Final answer
    x = 7,158.25

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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.