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Finding the Fourth Proportional to 8,277.80, 12,416.70 and 5,772.20

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Solution

The fourth proportional to 8,277.80, 12,416.70 and 5,772.20 is: 8,658.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,277.80 : 12,416.70 = 5,772.20 : x
  2. Step 2: Convert to fraction form
    8,277.80/12,416.70 = 5,772.20/x
  3. Step 3: Cross multiply
    8,277.80x = 12,416.70 × 5,772.20
  4. Step 4: Simplify right side
    8,277.80x = 71,671,675.74
  5. Step 5: Solve for x
    x = 71,671,675.74/8,277.80
  6. Step 6: Final answer
    x = 8,658.30

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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.