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Finding the Fourth Proportional to 57,873.72, 86,811.63 and 20,432.88

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Solution

The fourth proportional to 57,873.72, 86,811.63 and 20,432.88 is: 30,649.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,873.72 : 86,811.63 = 20,432.88 : x
  2. Step 2: Convert to fraction form
    57,873.72/86,811.63 = 20,432.88/x
  3. Step 3: Cross multiply
    57,873.72x = 86,811.63 × 20,432.88
  4. Step 4: Simplify right side
    57,873.72x = 1,773,811,618.39
  5. Step 5: Solve for x
    x = 1,773,811,618.39/57,873.72
  6. Step 6: Final answer
    x = 30,649.69

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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.