Home / 9,138.32-12,610.92-5,412.08

Finding the Fourth Proportional to 9,138.32, 12,610.92 and 5,412.08

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Solution

The fourth proportional to 9,138.32, 12,610.92 and 5,412.08 is: 7,468.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.32 : 12,610.92 = 5,412.08 : x
  2. Step 2: Convert to fraction form
    9,138.32/12,610.92 = 5,412.08/x
  3. Step 3: Cross multiply
    9,138.32x = 12,610.92 × 5,412.08
  4. Step 4: Simplify right side
    9,138.32x = 68,251,307.91
  5. Step 5: Solve for x
    x = 68,251,307.91/9,138.32
  6. Step 6: Final answer
    x = 7,468.69

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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.