Home / 28,218.72-42,306.48-13,978.56

Finding the Fourth Proportional to 28,218.72, 42,306.48 and 13,978.56

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Solution

The fourth proportional to 28,218.72, 42,306.48 and 13,978.56 is: 20,957.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.72 : 42,306.48 = 13,978.56 : x
  2. Step 2: Convert to fraction form
    28,218.72/42,306.48 = 13,978.56/x
  3. Step 3: Cross multiply
    28,218.72x = 42,306.48 × 13,978.56
  4. Step 4: Simplify right side
    28,218.72x = 591,383,669.07
  5. Step 5: Solve for x
    x = 591,383,669.07/28,218.72
  6. Step 6: Final answer
    x = 20,957.14

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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.