Home / 39,780.72-54,902.40-23,013.72

Finding the Fourth Proportional to 39,780.72, 54,902.40 and 23,013.72

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Solution

The fourth proportional to 39,780.72, 54,902.40 and 23,013.72 is: 31,761.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.72 : 54,902.40 = 23,013.72 : x
  2. Step 2: Convert to fraction form
    39,780.72/54,902.40 = 23,013.72/x
  3. Step 3: Cross multiply
    39,780.72x = 54,902.40 × 23,013.72
  4. Step 4: Simplify right side
    39,780.72x = 1,263,508,460.93
  5. Step 5: Solve for x
    x = 1,263,508,460.93/39,780.72
  6. Step 6: Final answer
    x = 31,761.83

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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.