Home / 9,159.16-12,639.54-5,180.32

Finding the Fourth Proportional to 9,159.16, 12,639.54 and 5,180.32

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Solution

The fourth proportional to 9,159.16, 12,639.54 and 5,180.32 is: 7,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.16 : 12,639.54 = 5,180.32 : x
  2. Step 2: Convert to fraction form
    9,159.16/12,639.54 = 5,180.32/x
  3. Step 3: Cross multiply
    9,159.16x = 12,639.54 × 5,180.32
  4. Step 4: Simplify right side
    9,159.16x = 65,476,861.85
  5. Step 5: Solve for x
    x = 65,476,861.85/9,159.16
  6. Step 6: Final answer
    x = 7,148.78

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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.