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Finding the Fourth Proportional to 11,909.91, 17,870.90 and 5,668.76

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Solution

The fourth proportional to 11,909.91, 17,870.90 and 5,668.76 is: 8,506.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,909.91 : 17,870.90 = 5,668.76 : x
  2. Step 2: Convert to fraction form
    11,909.91/17,870.90 = 5,668.76/x
  3. Step 3: Cross multiply
    11,909.91x = 17,870.90 × 5,668.76
  4. Step 4: Simplify right side
    11,909.91x = 101,305,856.99
  5. Step 5: Solve for x
    x = 101,305,856.99/11,909.91
  6. Step 6: Final answer
    x = 8,506.01

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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.