Home / 5,129.22-7,079.07-3,139.45

Finding the Fourth Proportional to 5,129.22, 7,079.07 and 3,139.45

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Solution

The fourth proportional to 5,129.22, 7,079.07 and 3,139.45 is: 4,332.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.22 : 7,079.07 = 3,139.45 : x
  2. Step 2: Convert to fraction form
    5,129.22/7,079.07 = 3,139.45/x
  3. Step 3: Cross multiply
    5,129.22x = 7,079.07 × 3,139.45
  4. Step 4: Simplify right side
    5,129.22x = 22,224,386.31
  5. Step 5: Solve for x
    x = 22,224,386.31/5,129.22
  6. Step 6: Final answer
    x = 4,332.90

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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.