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Finding the Fourth Proportional to 7,875.96, 11,720.97 and 7,613.48

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Solution

The fourth proportional to 7,875.96, 11,720.97 and 7,613.48 is: 11,330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.96 : 11,720.97 = 7,613.48 : x
  2. Step 2: Convert to fraction form
    7,875.96/11,720.97 = 7,613.48/x
  3. Step 3: Cross multiply
    7,875.96x = 11,720.97 × 7,613.48
  4. Step 4: Simplify right side
    7,875.96x = 89,237,370.68
  5. Step 5: Solve for x
    x = 89,237,370.68/7,875.96
  6. Step 6: Final answer
    x = 11,330.35

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Half scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.