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Finding the Fourth Proportional to 8,505.60, 11,734.80 and 5,316.72

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Solution

The fourth proportional to 8,505.60, 11,734.80 and 5,316.72 is: 7,335.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.60 : 11,734.80 = 5,316.72 : x
  2. Step 2: Convert to fraction form
    8,505.60/11,734.80 = 5,316.72/x
  3. Step 3: Cross multiply
    8,505.60x = 11,734.80 × 5,316.72
  4. Step 4: Simplify right side
    8,505.60x = 62,390,645.86
  5. Step 5: Solve for x
    x = 62,390,645.86/8,505.60
  6. Step 6: Final answer
    x = 7,335.24

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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.