Home / 28,339.92-42,674.48-20,996.40

Finding the Fourth Proportional to 28,339.92, 42,674.48 and 20,996.40

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Solution

The fourth proportional to 28,339.92, 42,674.48 and 20,996.40 is: 31,616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,339.92 : 42,674.48 = 20,996.40 : x
  2. Step 2: Convert to fraction form
    28,339.92/42,674.48 = 20,996.40/x
  3. Step 3: Cross multiply
    28,339.92x = 42,674.48 × 20,996.40
  4. Step 4: Simplify right side
    28,339.92x = 896,010,451.87
  5. Step 5: Solve for x
    x = 896,010,451.87/28,339.92
  6. Step 6: Final answer
    x = 31,616.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.