Home / 20,730.69-28,608.44-11,781.18

Finding the Fourth Proportional to 20,730.69, 28,608.44 and 11,781.18

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Solution

The fourth proportional to 20,730.69, 28,608.44 and 11,781.18 is: 16,258.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.69 : 28,608.44 = 11,781.18 : x
  2. Step 2: Convert to fraction form
    20,730.69/28,608.44 = 11,781.18/x
  3. Step 3: Cross multiply
    20,730.69x = 28,608.44 × 11,781.18
  4. Step 4: Simplify right side
    20,730.69x = 337,041,122.25
  5. Step 5: Solve for x
    x = 337,041,122.25/20,730.69
  6. Step 6: Final answer
    x = 16,258.08

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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.