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Finding the Fourth Proportional to 55,590.80, 83,357.40 and 20,512.40

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Solution

The fourth proportional to 55,590.80, 83,357.40 and 20,512.40 is: 30,757.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,590.80 : 83,357.40 = 20,512.40 : x
  2. Step 2: Convert to fraction form
    55,590.80/83,357.40 = 20,512.40/x
  3. Step 3: Cross multiply
    55,590.80x = 83,357.40 × 20,512.40
  4. Step 4: Simplify right side
    55,590.80x = 1,709,860,331.76
  5. Step 5: Solve for x
    x = 1,709,860,331.76/55,590.80
  6. Step 6: Final answer
    x = 30,757.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.