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Finding the Fourth Proportional to 8,405.40, 12,610.80 and 2,562.60

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Solution

The fourth proportional to 8,405.40, 12,610.80 and 2,562.60 is: 3,844.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.40 : 12,610.80 = 2,562.60 : x
  2. Step 2: Convert to fraction form
    8,405.40/12,610.80 = 2,562.60/x
  3. Step 3: Cross multiply
    8,405.40x = 12,610.80 × 2,562.60
  4. Step 4: Simplify right side
    8,405.40x = 32,316,436.08
  5. Step 5: Solve for x
    x = 32,316,436.08/8,405.40
  6. Step 6: Final answer
    x = 3,844.72

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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.