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Finding the Fourth Proportional to 28,657.20, 42,985.80 and 26,032.80

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Solution

The fourth proportional to 28,657.20, 42,985.80 and 26,032.80 is: 39,049.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.20 : 42,985.80 = 26,032.80 : x
  2. Step 2: Convert to fraction form
    28,657.20/42,985.80 = 26,032.80/x
  3. Step 3: Cross multiply
    28,657.20x = 42,985.80 × 26,032.80
  4. Step 4: Simplify right side
    28,657.20x = 1,119,040,734.24
  5. Step 5: Solve for x
    x = 1,119,040,734.24/28,657.20
  6. Step 6: Final answer
    x = 39,049.20

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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.