Home / 53,938.32-80,908.16-20,660.38

Finding the Fourth Proportional to 53,938.32, 80,908.16 and 20,660.38

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Solution

The fourth proportional to 53,938.32, 80,908.16 and 20,660.38 is: 30,990.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,938.32 : 80,908.16 = 20,660.38 : x
  2. Step 2: Convert to fraction form
    53,938.32/80,908.16 = 20,660.38/x
  3. Step 3: Cross multiply
    53,938.32x = 80,908.16 × 20,660.38
  4. Step 4: Simplify right side
    53,938.32x = 1,671,593,330.70
  5. Step 5: Solve for x
    x = 1,671,593,330.70/53,938.32
  6. Step 6: Final answer
    x = 30,990.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.