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Finding the Fourth Proportional to 28,308.31, 42,462.31 and 7,248.31

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Solution

The fourth proportional to 28,308.31, 42,462.31 and 7,248.31 is: 10,872.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,308.31 : 42,462.31 = 7,248.31 : x
  2. Step 2: Convert to fraction form
    28,308.31/42,462.31 = 7,248.31/x
  3. Step 3: Cross multiply
    28,308.31x = 42,462.31 × 7,248.31
  4. Step 4: Simplify right side
    28,308.31x = 307,779,986.20
  5. Step 5: Solve for x
    x = 307,779,986.20/28,308.31
  6. Step 6: Final answer
    x = 10,872.43

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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.