Home / 13,445.28-18,556.20-8,140.32

Finding the Fourth Proportional to 13,445.28, 18,556.20 and 8,140.32

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Solution

The fourth proportional to 13,445.28, 18,556.20 and 8,140.32 is: 11,234.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.28 : 18,556.20 = 8,140.32 : x
  2. Step 2: Convert to fraction form
    13,445.28/18,556.20 = 8,140.32/x
  3. Step 3: Cross multiply
    13,445.28x = 18,556.20 × 8,140.32
  4. Step 4: Simplify right side
    13,445.28x = 151,053,405.98
  5. Step 5: Solve for x
    x = 151,053,405.98/13,445.28
  6. Step 6: Final answer
    x = 11,234.68

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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.