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Finding the Fourth Proportional to 53,971.20, 80,956.80 and 18,907.20

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Solution

The fourth proportional to 53,971.20, 80,956.80 and 18,907.20 is: 28,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,971.20 : 80,956.80 = 18,907.20 : x
  2. Step 2: Convert to fraction form
    53,971.20/80,956.80 = 18,907.20/x
  3. Step 3: Cross multiply
    53,971.20x = 80,956.80 × 18,907.20
  4. Step 4: Simplify right side
    53,971.20x = 1,530,666,408.96
  5. Step 5: Solve for x
    x = 1,530,666,408.96/53,971.20
  6. Step 6: Final answer
    x = 28,360.80

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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.