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Finding the Fourth Proportional to 12,809.70, 19,214.55 and 6,904.80

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Solution

The fourth proportional to 12,809.70, 19,214.55 and 6,904.80 is: 10,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.70 : 19,214.55 = 6,904.80 : x
  2. Step 2: Convert to fraction form
    12,809.70/19,214.55 = 6,904.80/x
  3. Step 3: Cross multiply
    12,809.70x = 19,214.55 × 6,904.80
  4. Step 4: Simplify right side
    12,809.70x = 132,672,624.84
  5. Step 5: Solve for x
    x = 132,672,624.84/12,809.70
  6. Step 6: Final answer
    x = 10,357.20

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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.