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Finding the Fourth Proportional to 12,808.81, 19,200.04 and 4,909.18

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Solution

The fourth proportional to 12,808.81, 19,200.04 and 4,909.18 is: 7,358.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.81 : 19,200.04 = 4,909.18 : x
  2. Step 2: Convert to fraction form
    12,808.81/19,200.04 = 4,909.18/x
  3. Step 3: Cross multiply
    12,808.81x = 19,200.04 × 4,909.18
  4. Step 4: Simplify right side
    12,808.81x = 94,256,452.37
  5. Step 5: Solve for x
    x = 94,256,452.37/12,808.81
  6. Step 6: Final answer
    x = 7,358.72

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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.