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Finding the Fourth Proportional to 7,729.60, 11,594.40 and 7,427.20

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Solution

The fourth proportional to 7,729.60, 11,594.40 and 7,427.20 is: 11,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,729.60 : 11,594.40 = 7,427.20 : x
  2. Step 2: Convert to fraction form
    7,729.60/11,594.40 = 7,427.20/x
  3. Step 3: Cross multiply
    7,729.60x = 11,594.40 × 7,427.20
  4. Step 4: Simplify right side
    7,729.60x = 86,113,927.68
  5. Step 5: Solve for x
    x = 86,113,927.68/7,729.60
  6. Step 6: Final answer
    x = 11,140.80

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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.