Home / 13,112.20-18,094.80-7,143.92

Finding the Fourth Proportional to 13,112.20, 18,094.80 and 7,143.92

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Solution

The fourth proportional to 13,112.20, 18,094.80 and 7,143.92 is: 9,858.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,112.20 : 18,094.80 = 7,143.92 : x
  2. Step 2: Convert to fraction form
    13,112.20/18,094.80 = 7,143.92/x
  3. Step 3: Cross multiply
    13,112.20x = 18,094.80 × 7,143.92
  4. Step 4: Simplify right side
    13,112.20x = 129,267,803.62
  5. Step 5: Solve for x
    x = 129,267,803.62/13,112.20
  6. Step 6: Final answer
    x = 9,858.59

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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.