Home / 9,157.77-12,640.21-5,382.15

Finding the Fourth Proportional to 9,157.77, 12,640.21 and 5,382.15

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Solution

The fourth proportional to 9,157.77, 12,640.21 and 5,382.15 is: 7,428.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,157.77 : 12,640.21 = 5,382.15 : x
  2. Step 2: Convert to fraction form
    9,157.77/12,640.21 = 5,382.15/x
  3. Step 3: Cross multiply
    9,157.77x = 12,640.21 × 5,382.15
  4. Step 4: Simplify right side
    9,157.77x = 68,031,496.08
  5. Step 5: Solve for x
    x = 68,031,496.08/9,157.77
  6. Step 6: Final answer
    x = 7,428.83

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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.