Home / 9,114.40-12,578.13-5,135.29

Finding the Fourth Proportional to 9,114.40, 12,578.13 and 5,135.29

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Solution

The fourth proportional to 9,114.40, 12,578.13 and 5,135.29 is: 7,086.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,114.40 : 12,578.13 = 5,135.29 : x
  2. Step 2: Convert to fraction form
    9,114.40/12,578.13 = 5,135.29/x
  3. Step 3: Cross multiply
    9,114.40x = 12,578.13 × 5,135.29
  4. Step 4: Simplify right side
    9,114.40x = 64,592,345.21
  5. Step 5: Solve for x
    x = 64,592,345.21/9,114.40
  6. Step 6: Final answer
    x = 7,086.85

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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.