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Finding the Fourth Proportional to 55,920.80, 83,806.64 and 20,825.12

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Solution

The fourth proportional to 55,920.80, 83,806.64 and 20,825.12 is: 31,209.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,920.80 : 83,806.64 = 20,825.12 : x
  2. Step 2: Convert to fraction form
    55,920.80/83,806.64 = 20,825.12/x
  3. Step 3: Cross multiply
    55,920.80x = 83,806.64 × 20,825.12
  4. Step 4: Simplify right side
    55,920.80x = 1,745,283,334.80
  5. Step 5: Solve for x
    x = 1,745,283,334.80/55,920.80
  6. Step 6: Final answer
    x = 31,209.91

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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.