Home / 13,145.85-18,141.33-7,177.66

Finding the Fourth Proportional to 13,145.85, 18,141.33 and 7,177.66

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Solution

The fourth proportional to 13,145.85, 18,141.33 and 7,177.66 is: 9,905.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.85 : 18,141.33 = 7,177.66 : x
  2. Step 2: Convert to fraction form
    13,145.85/18,141.33 = 7,177.66/x
  3. Step 3: Cross multiply
    13,145.85x = 18,141.33 × 7,177.66
  4. Step 4: Simplify right side
    13,145.85x = 130,212,382.30
  5. Step 5: Solve for x
    x = 130,212,382.30/13,145.85
  6. Step 6: Final answer
    x = 9,905.21

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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.