Home / 13,139.02-18,132.02-7,170.85

Finding the Fourth Proportional to 13,139.02, 18,132.02 and 7,170.85

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Solution

The fourth proportional to 13,139.02, 18,132.02 and 7,170.85 is: 9,895.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.02 : 18,132.02 = 7,170.85 : x
  2. Step 2: Convert to fraction form
    13,139.02/18,132.02 = 7,170.85/x
  3. Step 3: Cross multiply
    13,139.02x = 18,132.02 × 7,170.85
  4. Step 4: Simplify right side
    13,139.02x = 130,021,995.62
  5. Step 5: Solve for x
    x = 130,021,995.62/13,139.02
  6. Step 6: Final answer
    x = 9,895.87

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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.