Home / 9,158.66-12,639.57-5,179.77

Finding the Fourth Proportional to 9,158.66, 12,639.57 and 5,179.77

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Solution

The fourth proportional to 9,158.66, 12,639.57 and 5,179.77 is: 7,148.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,158.66 : 12,639.57 = 5,179.77 : x
  2. Step 2: Convert to fraction form
    9,158.66/12,639.57 = 5,179.77/x
  3. Step 3: Cross multiply
    9,158.66x = 12,639.57 × 5,179.77
  4. Step 4: Simplify right side
    9,158.66x = 65,470,065.50
  5. Step 5: Solve for x
    x = 65,470,065.50/9,158.66
  6. Step 6: Final answer
    x = 7,148.43

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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.