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Finding the Fourth Proportional to 7,480.80, 11,221.20 and 5,283

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Solution

The fourth proportional to 7,480.80, 11,221.20 and 5,283 is: 7,924.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,480.80 : 11,221.20 = 5,283 : x
  2. Step 2: Convert to fraction form
    7,480.80/11,221.20 = 5,283/x
  3. Step 3: Cross multiply
    7,480.80x = 11,221.20 × 5,283
  4. Step 4: Simplify right side
    7,480.80x = 59,281,599.60
  5. Step 5: Solve for x
    x = 59,281,599.60/7,480.80
  6. Step 6: Final answer
    x = 7,924.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 7,481.80, 11,222.70 and 5,284
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.