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Finding the Fourth Proportional to 28,062.80, 42,072.60 and 15,750.80

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Solution

The fourth proportional to 28,062.80, 42,072.60 and 15,750.80 is: 23,614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,062.80 : 42,072.60 = 15,750.80 : x
  2. Step 2: Convert to fraction form
    28,062.80/42,072.60 = 15,750.80/x
  3. Step 3: Cross multiply
    28,062.80x = 42,072.60 × 15,750.80
  4. Step 4: Simplify right side
    28,062.80x = 662,677,108.08
  5. Step 5: Solve for x
    x = 662,677,108.08/28,062.80
  6. Step 6: Final answer
    x = 23,614.08

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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.