Home / 28,442.34-42,663.78-8,721

Finding the Fourth Proportional to 28,442.34, 42,663.78 and 8,721

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Solution

The fourth proportional to 28,442.34, 42,663.78 and 8,721 is: 13,081.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.34 : 42,663.78 = 8,721 : x
  2. Step 2: Convert to fraction form
    28,442.34/42,663.78 = 8,721/x
  3. Step 3: Cross multiply
    28,442.34x = 42,663.78 × 8,721
  4. Step 4: Simplify right side
    28,442.34x = 372,070,825.38
  5. Step 5: Solve for x
    x = 372,070,825.38/28,442.34
  6. Step 6: Final answer
    x = 13,081.58

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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.