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Finding the Fourth Proportional to 57,859.20, 86,788.80 and 18,420.30

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Solution

The fourth proportional to 57,859.20, 86,788.80 and 18,420.30 is: 27,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,859.20 : 86,788.80 = 18,420.30 : x
  2. Step 2: Convert to fraction form
    57,859.20/86,788.80 = 18,420.30/x
  3. Step 3: Cross multiply
    57,859.20x = 86,788.80 × 18,420.30
  4. Step 4: Simplify right side
    57,859.20x = 1,598,675,732.64
  5. Step 5: Solve for x
    x = 1,598,675,732.64/57,859.20
  6. Step 6: Final answer
    x = 27,630.45

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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.