Home / 9,139.44-12,612.33-5,160.32

Finding the Fourth Proportional to 9,139.44, 12,612.33 and 5,160.32

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Solution

The fourth proportional to 9,139.44, 12,612.33 and 5,160.32 is: 7,121.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.44 : 12,612.33 = 5,160.32 : x
  2. Step 2: Convert to fraction form
    9,139.44/12,612.33 = 5,160.32/x
  3. Step 3: Cross multiply
    9,139.44x = 12,612.33 × 5,160.32
  4. Step 4: Simplify right side
    9,139.44x = 65,083,595.68
  5. Step 5: Solve for x
    x = 65,083,595.68/9,139.44
  6. Step 6: Final answer
    x = 7,121.18

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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.