Home / 9,158.84-12,639.88-5,180.36

Finding the Fourth Proportional to 9,158.84, 12,639.88 and 5,180.36

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Solution

The fourth proportional to 9,158.84, 12,639.88 and 5,180.36 is: 7,149.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,158.84 : 12,639.88 = 5,180.36 : x
  2. Step 2: Convert to fraction form
    9,158.84/12,639.88 = 5,180.36/x
  3. Step 3: Cross multiply
    9,158.84x = 12,639.88 × 5,180.36
  4. Step 4: Simplify right side
    9,158.84x = 65,479,128.76
  5. Step 5: Solve for x
    x = 65,479,128.76/9,158.84
  6. Step 6: Final answer
    x = 7,149.28

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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.