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Finding the Fourth Proportional to 8,852.80, 13,279.20 and 5,742.40

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Solution

The fourth proportional to 8,852.80, 13,279.20 and 5,742.40 is: 8,613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,852.80 : 13,279.20 = 5,742.40 : x
  2. Step 2: Convert to fraction form
    8,852.80/13,279.20 = 5,742.40/x
  3. Step 3: Cross multiply
    8,852.80x = 13,279.20 × 5,742.40
  4. Step 4: Simplify right side
    8,852.80x = 76,254,478.08
  5. Step 5: Solve for x
    x = 76,254,478.08/8,852.80
  6. Step 6: Final answer
    x = 8,613.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.