Home / 9,135.72-12,607.25-5,158.13

Finding the Fourth Proportional to 9,135.72, 12,607.25 and 5,158.13

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Solution

The fourth proportional to 9,135.72, 12,607.25 and 5,158.13 is: 7,118.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.72 : 12,607.25 = 5,158.13 : x
  2. Step 2: Convert to fraction form
    9,135.72/12,607.25 = 5,158.13/x
  3. Step 3: Cross multiply
    9,135.72x = 12,607.25 × 5,158.13
  4. Step 4: Simplify right side
    9,135.72x = 65,029,745.62
  5. Step 5: Solve for x
    x = 65,029,745.62/9,135.72
  6. Step 6: Final answer
    x = 7,118.19

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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.