Home / 18,128.40-25,042.68-13,989.84

Finding the Fourth Proportional to 18,128.40, 25,042.68 and 13,989.84

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Solution

The fourth proportional to 18,128.40, 25,042.68 and 13,989.84 is: 19,325.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.40 : 25,042.68 = 13,989.84 : x
  2. Step 2: Convert to fraction form
    18,128.40/25,042.68 = 13,989.84/x
  3. Step 3: Cross multiply
    18,128.40x = 25,042.68 × 13,989.84
  4. Step 4: Simplify right side
    18,128.40x = 350,343,086.37
  5. Step 5: Solve for x
    x = 350,343,086.37/18,128.40
  6. Step 6: Final answer
    x = 19,325.65

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Similar ratio
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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.