Home / 13,057.12-18,010.88-7,750.80

Finding the Fourth Proportional to 13,057.12, 18,010.88 and 7,750.80

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Solution

The fourth proportional to 13,057.12, 18,010.88 and 7,750.80 is: 10,691.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,057.12 : 18,010.88 = 7,750.80 : x
  2. Step 2: Convert to fraction form
    13,057.12/18,010.88 = 7,750.80/x
  3. Step 3: Cross multiply
    13,057.12x = 18,010.88 × 7,750.80
  4. Step 4: Simplify right side
    13,057.12x = 139,598,728.70
  5. Step 5: Solve for x
    x = 139,598,728.70/13,057.12
  6. Step 6: Final answer
    x = 10,691.39

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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.