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Finding the Fourth Proportional to 12,808.80, 19,216.80 and 6,235.20

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Solution

The fourth proportional to 12,808.80, 19,216.80 and 6,235.20 is: 9,354.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.80 : 19,216.80 = 6,235.20 : x
  2. Step 2: Convert to fraction form
    12,808.80/19,216.80 = 6,235.20/x
  3. Step 3: Cross multiply
    12,808.80x = 19,216.80 × 6,235.20
  4. Step 4: Simplify right side
    12,808.80x = 119,820,591.36
  5. Step 5: Solve for x
    x = 119,820,591.36/12,808.80
  6. Step 6: Final answer
    x = 9,354.55

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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.