Home / 28,825.61-39,761.15-19,857.56

Finding the Fourth Proportional to 28,825.61, 39,761.15 and 19,857.56

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Solution

The fourth proportional to 28,825.61, 39,761.15 and 19,857.56 is: 27,390.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,825.61 : 39,761.15 = 19,857.56 : x
  2. Step 2: Convert to fraction form
    28,825.61/39,761.15 = 19,857.56/x
  3. Step 3: Cross multiply
    28,825.61x = 39,761.15 × 19,857.56
  4. Step 4: Simplify right side
    28,825.61x = 789,559,123.70
  5. Step 5: Solve for x
    x = 789,559,123.70/28,825.61
  6. Step 6: Final answer
    x = 27,390.90

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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.