Home / 20,397.78-28,148.99-11,445.30

Finding the Fourth Proportional to 20,397.78, 28,148.99 and 11,445.30

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Solution

The fourth proportional to 20,397.78, 28,148.99 and 11,445.30 is: 15,794.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.78 : 28,148.99 = 11,445.30 : x
  2. Step 2: Convert to fraction form
    20,397.78/28,148.99 = 11,445.30/x
  3. Step 3: Cross multiply
    20,397.78x = 28,148.99 × 11,445.30
  4. Step 4: Simplify right side
    20,397.78x = 322,173,578.02
  5. Step 5: Solve for x
    x = 322,173,578.02/20,397.78
  6. Step 6: Final answer
    x = 15,794.54

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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.