Home / 28,959.12-39,920-22,660.56

Finding the Fourth Proportional to 28,959.12, 39,920 and 22,660.56

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Solution

The fourth proportional to 28,959.12, 39,920 and 22,660.56 is: 31,237.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,959.12 : 39,920 = 22,660.56 : x
  2. Step 2: Convert to fraction form
    28,959.12/39,920 = 22,660.56/x
  3. Step 3: Cross multiply
    28,959.12x = 39,920 × 22,660.56
  4. Step 4: Simplify right side
    28,959.12x = 904,609,555.20
  5. Step 5: Solve for x
    x = 904,609,555.20/28,959.12
  6. Step 6: Final answer
    x = 31,237.47

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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.