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Finding the Fourth Proportional to 8,353.60, 12,530.40 and 2,807.80

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Solution

The fourth proportional to 8,353.60, 12,530.40 and 2,807.80 is: 4,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,353.60 : 12,530.40 = 2,807.80 : x
  2. Step 2: Convert to fraction form
    8,353.60/12,530.40 = 2,807.80/x
  3. Step 3: Cross multiply
    8,353.60x = 12,530.40 × 2,807.80
  4. Step 4: Simplify right side
    8,353.60x = 35,182,857.12
  5. Step 5: Solve for x
    x = 35,182,857.12/8,353.60
  6. Step 6: Final answer
    x = 4,211.70

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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.