Home / 3,160.80-4,332.24-3,139.20

Finding the Fourth Proportional to 3,160.80, 4,332.24 and 3,139.20

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Solution

The fourth proportional to 3,160.80, 4,332.24 and 3,139.20 is: 4,302.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,160.80 : 4,332.24 = 3,139.20 : x
  2. Step 2: Convert to fraction form
    3,160.80/4,332.24 = 3,139.20/x
  3. Step 3: Cross multiply
    3,160.80x = 4,332.24 × 3,139.20
  4. Step 4: Simplify right side
    3,160.80x = 13,599,767.81
  5. Step 5: Solve for x
    x = 13,599,767.81/3,160.80
  6. Step 6: Final answer
    x = 4,302.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.