Home / 20,717.16-28,590.12-11,285.70

Finding the Fourth Proportional to 20,717.16, 28,590.12 and 11,285.70

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Solution

The fourth proportional to 20,717.16, 28,590.12 and 11,285.70 is: 15,574.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.16 : 28,590.12 = 11,285.70 : x
  2. Step 2: Convert to fraction form
    20,717.16/28,590.12 = 11,285.70/x
  3. Step 3: Cross multiply
    20,717.16x = 28,590.12 × 11,285.70
  4. Step 4: Simplify right side
    20,717.16x = 322,659,517.28
  5. Step 5: Solve for x
    x = 322,659,517.28/20,717.16
  6. Step 6: Final answer
    x = 15,574.51

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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.