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Finding the Fourth Proportional to 6,613.92, 9,118.08 and 5,615.28

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Solution

The fourth proportional to 6,613.92, 9,118.08 and 5,615.28 is: 7,741.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.92 : 9,118.08 = 5,615.28 : x
  2. Step 2: Convert to fraction form
    6,613.92/9,118.08 = 5,615.28/x
  3. Step 3: Cross multiply
    6,613.92x = 9,118.08 × 5,615.28
  4. Step 4: Simplify right side
    6,613.92x = 51,200,572.26
  5. Step 5: Solve for x
    x = 51,200,572.26/6,613.92
  6. Step 6: Final answer
    x = 7,741.34

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Double scale
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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.