Home / 9,178.40-12,660.88-5,451.68

Finding the Fourth Proportional to 9,178.40, 12,660.88 and 5,451.68

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Solution

The fourth proportional to 9,178.40, 12,660.88 and 5,451.68 is: 7,520.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,178.40 : 12,660.88 = 5,451.68 : x
  2. Step 2: Convert to fraction form
    9,178.40/12,660.88 = 5,451.68/x
  3. Step 3: Cross multiply
    9,178.40x = 12,660.88 × 5,451.68
  4. Step 4: Simplify right side
    9,178.40x = 69,023,066.28
  5. Step 5: Solve for x
    x = 69,023,066.28/9,178.40
  6. Step 6: Final answer
    x = 7,520.16

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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.