Home / 20,421.27-30,627.23-5,631.48

Finding the Fourth Proportional to 20,421.27, 30,627.23 and 5,631.48

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Solution

The fourth proportional to 20,421.27, 30,627.23 and 5,631.48 is: 8,445.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.27 : 30,627.23 = 5,631.48 : x
  2. Step 2: Convert to fraction form
    20,421.27/30,627.23 = 5,631.48/x
  3. Step 3: Cross multiply
    20,421.27x = 30,627.23 × 5,631.48
  4. Step 4: Simplify right side
    20,421.27x = 172,476,605.04
  5. Step 5: Solve for x
    x = 172,476,605.04/20,421.27
  6. Step 6: Final answer
    x = 8,445.93

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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.