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Finding the Fourth Proportional to 8,322.80, 12,467.40 and 5,193.20

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Solution

The fourth proportional to 8,322.80, 12,467.40 and 5,193.20 is: 7,779.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,322.80 : 12,467.40 = 5,193.20 : x
  2. Step 2: Convert to fraction form
    8,322.80/12,467.40 = 5,193.20/x
  3. Step 3: Cross multiply
    8,322.80x = 12,467.40 × 5,193.20
  4. Step 4: Simplify right side
    8,322.80x = 64,745,701.68
  5. Step 5: Solve for x
    x = 64,745,701.68/8,322.80
  6. Step 6: Final answer
    x = 7,779.32

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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.