Home / 7,129.57-9,839.34-3,985.57

Finding the Fourth Proportional to 7,129.57, 9,839.34 and 3,985.57

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Solution

The fourth proportional to 7,129.57, 9,839.34 and 3,985.57 is: 5,500.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.57 : 9,839.34 = 3,985.57 : x
  2. Step 2: Convert to fraction form
    7,129.57/9,839.34 = 3,985.57/x
  3. Step 3: Cross multiply
    7,129.57x = 9,839.34 × 3,985.57
  4. Step 4: Simplify right side
    7,129.57x = 39,215,378.32
  5. Step 5: Solve for x
    x = 39,215,378.32/7,129.57
  6. Step 6: Final answer
    x = 5,500.38

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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.