Home / 18,239.40-25,167.78-12,938.76

Finding the Fourth Proportional to 18,239.40, 25,167.78 and 12,938.76

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Solution

The fourth proportional to 18,239.40, 25,167.78 and 12,938.76 is: 17,853.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,239.40 : 25,167.78 = 12,938.76 : x
  2. Step 2: Convert to fraction form
    18,239.40/25,167.78 = 12,938.76/x
  3. Step 3: Cross multiply
    18,239.40x = 25,167.78 × 12,938.76
  4. Step 4: Simplify right side
    18,239.40x = 325,639,865.15
  5. Step 5: Solve for x
    x = 325,639,865.15/18,239.40
  6. Step 6: Final answer
    x = 17,853.65

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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.