Home / 20,397.74-28,149.31-11,445.89

Finding the Fourth Proportional to 20,397.74, 28,149.31 and 11,445.89

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Solution

The fourth proportional to 20,397.74, 28,149.31 and 11,445.89 is: 15,795.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.74 : 28,149.31 = 11,445.89 : x
  2. Step 2: Convert to fraction form
    20,397.74/28,149.31 = 11,445.89/x
  3. Step 3: Cross multiply
    20,397.74x = 28,149.31 × 11,445.89
  4. Step 4: Simplify right side
    20,397.74x = 322,193,905.84
  5. Step 5: Solve for x
    x = 322,193,905.84/20,397.74
  6. Step 6: Final answer
    x = 15,795.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.