Home / 20,578.80-28,445.40-18,945.84

Finding the Fourth Proportional to 20,578.80, 28,445.40 and 18,945.84

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Solution

The fourth proportional to 20,578.80, 28,445.40 and 18,945.84 is: 26,188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.80 : 28,445.40 = 18,945.84 : x
  2. Step 2: Convert to fraction form
    20,578.80/28,445.40 = 18,945.84/x
  3. Step 3: Cross multiply
    20,578.80x = 28,445.40 × 18,945.84
  4. Step 4: Simplify right side
    20,578.80x = 538,921,997.14
  5. Step 5: Solve for x
    x = 538,921,997.14/20,578.80
  6. Step 6: Final answer
    x = 26,188.21

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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.