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Finding the Fourth Proportional to 53,456.72, 80,202.90 and 17,921.55

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Solution

The fourth proportional to 53,456.72, 80,202.90 and 17,921.55 is: 26,888.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,456.72 : 80,202.90 = 17,921.55 : x
  2. Step 2: Convert to fraction form
    53,456.72/80,202.90 = 17,921.55/x
  3. Step 3: Cross multiply
    53,456.72x = 80,202.90 × 17,921.55
  4. Step 4: Simplify right side
    53,456.72x = 1,437,360,524.45
  5. Step 5: Solve for x
    x = 1,437,360,524.45/53,456.72
  6. Step 6: Final answer
    x = 26,888.30

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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.