Home / 28,930.20-39,939.42-18,864.78

Finding the Fourth Proportional to 28,930.20, 39,939.42 and 18,864.78

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Solution

The fourth proportional to 28,930.20, 39,939.42 and 18,864.78 is: 26,043.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.20 : 39,939.42 = 18,864.78 : x
  2. Step 2: Convert to fraction form
    28,930.20/39,939.42 = 18,864.78/x
  3. Step 3: Cross multiply
    28,930.20x = 39,939.42 × 18,864.78
  4. Step 4: Simplify right side
    28,930.20x = 753,448,371.63
  5. Step 5: Solve for x
    x = 753,448,371.63/28,930.20
  6. Step 6: Final answer
    x = 26,043.66

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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.