Home / 20,665.40-28,513.55-11,710.85

Finding the Fourth Proportional to 20,665.40, 28,513.55 and 11,710.85

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Solution

The fourth proportional to 20,665.40, 28,513.55 and 11,710.85 is: 16,158.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.40 : 28,513.55 = 11,710.85 : x
  2. Step 2: Convert to fraction form
    20,665.40/28,513.55 = 11,710.85/x
  3. Step 3: Cross multiply
    20,665.40x = 28,513.55 × 11,710.85
  4. Step 4: Simplify right side
    20,665.40x = 333,917,793.73
  5. Step 5: Solve for x
    x = 333,917,793.73/20,665.40
  6. Step 6: Final answer
    x = 16,158.31

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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.