Home / 7,347.12-10,138.74-3,989.87

Finding the Fourth Proportional to 7,347.12, 10,138.74 and 3,989.87

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Solution

The fourth proportional to 7,347.12, 10,138.74 and 3,989.87 is: 5,505.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.12 : 10,138.74 = 3,989.87 : x
  2. Step 2: Convert to fraction form
    7,347.12/10,138.74 = 3,989.87/x
  3. Step 3: Cross multiply
    7,347.12x = 10,138.74 × 3,989.87
  4. Step 4: Simplify right side
    7,347.12x = 40,452,203.87
  5. Step 5: Solve for x
    x = 40,452,203.87/7,347.12
  6. Step 6: Final answer
    x = 5,505.86

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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.