Home / 20,612.89-28,445.97-11,181.64

Finding the Fourth Proportional to 20,612.89, 28,445.97 and 11,181.64

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Solution

The fourth proportional to 20,612.89, 28,445.97 and 11,181.64 is: 15,430.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.89 : 28,445.97 = 11,181.64 : x
  2. Step 2: Convert to fraction form
    20,612.89/28,445.97 = 11,181.64/x
  3. Step 3: Cross multiply
    20,612.89x = 28,445.97 × 11,181.64
  4. Step 4: Simplify right side
    20,612.89x = 318,072,595.99
  5. Step 5: Solve for x
    x = 318,072,595.99/20,612.89
  6. Step 6: Final answer
    x = 15,430.76

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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.