Home / 28,856.15-39,838.05-21,996.32

Finding the Fourth Proportional to 28,856.15, 39,838.05 and 21,996.32

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Solution

The fourth proportional to 28,856.15, 39,838.05 and 21,996.32 is: 30,367.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,856.15 : 39,838.05 = 21,996.32 : x
  2. Step 2: Convert to fraction form
    28,856.15/39,838.05 = 21,996.32/x
  3. Step 3: Cross multiply
    28,856.15x = 39,838.05 × 21,996.32
  4. Step 4: Simplify right side
    28,856.15x = 876,290,470.69
  5. Step 5: Solve for x
    x = 876,290,470.69/28,856.15
  6. Step 6: Final answer
    x = 30,367.55

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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.