Home / 5,657.12-7,807.24-3,139.20

Finding the Fourth Proportional to 5,657.12, 7,807.24 and 3,139.20

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Solution

The fourth proportional to 5,657.12, 7,807.24 and 3,139.20 is: 4,332.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,657.12 : 7,807.24 = 3,139.20 : x
  2. Step 2: Convert to fraction form
    5,657.12/7,807.24 = 3,139.20/x
  3. Step 3: Cross multiply
    5,657.12x = 7,807.24 × 3,139.20
  4. Step 4: Simplify right side
    5,657.12x = 24,508,487.81
  5. Step 5: Solve for x
    x = 24,508,487.81/5,657.12
  6. Step 6: Final answer
    x = 4,332.33

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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.