Home / 13,145.76-18,141.54-7,177.82

Finding the Fourth Proportional to 13,145.76, 18,141.54 and 7,177.82

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Solution

The fourth proportional to 13,145.76, 18,141.54 and 7,177.82 is: 9,905.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.76 : 18,141.54 = 7,177.82 : x
  2. Step 2: Convert to fraction form
    13,145.76/18,141.54 = 7,177.82/x
  3. Step 3: Cross multiply
    13,145.76x = 18,141.54 × 7,177.82
  4. Step 4: Simplify right side
    13,145.76x = 130,216,708.64
  5. Step 5: Solve for x
    x = 130,216,708.64/13,145.76
  6. Step 6: Final answer
    x = 9,905.61

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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.