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Finding the Fourth Proportional to 11,407.68, 15,742.60 and 6,372.16

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Solution

The fourth proportional to 11,407.68, 15,742.60 and 6,372.16 is: 8,793.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,407.68 : 15,742.60 = 6,372.16 : x
  2. Step 2: Convert to fraction form
    11,407.68/15,742.60 = 6,372.16/x
  3. Step 3: Cross multiply
    11,407.68x = 15,742.60 × 6,372.16
  4. Step 4: Simplify right side
    11,407.68x = 100,314,366.02
  5. Step 5: Solve for x
    x = 100,314,366.02/11,407.68
  6. Step 6: Final answer
    x = 8,793.58

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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.