Home / 20,866.87-28,796.18-11,306.79

Finding the Fourth Proportional to 20,866.87, 28,796.18 and 11,306.79

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Solution

The fourth proportional to 20,866.87, 28,796.18 and 11,306.79 is: 15,603.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.87 : 28,796.18 = 11,306.79 : x
  2. Step 2: Convert to fraction form
    20,866.87/28,796.18 = 11,306.79/x
  3. Step 3: Cross multiply
    20,866.87x = 28,796.18 × 11,306.79
  4. Step 4: Simplify right side
    20,866.87x = 325,592,398.93
  5. Step 5: Solve for x
    x = 325,592,398.93/20,866.87
  6. Step 6: Final answer
    x = 15,603.32

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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.