Home / 13,086.20-18,059.10-7,117.89

Finding the Fourth Proportional to 13,086.20, 18,059.10 and 7,117.89

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Solution

The fourth proportional to 13,086.20, 18,059.10 and 7,117.89 is: 9,822.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,086.20 : 18,059.10 = 7,117.89 : x
  2. Step 2: Convert to fraction form
    13,086.20/18,059.10 = 7,117.89/x
  3. Step 3: Cross multiply
    13,086.20x = 18,059.10 × 7,117.89
  4. Step 4: Simplify right side
    13,086.20x = 128,542,597.00
  5. Step 5: Solve for x
    x = 128,542,597.00/13,086.20
  6. Step 6: Final answer
    x = 9,822.76

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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.