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Finding the Fourth Proportional to 12,904.67, 19,328.11 and 11,217.17

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Solution

The fourth proportional to 12,904.67, 19,328.11 and 11,217.17 is: 16,800.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.67 : 19,328.11 = 11,217.17 : x
  2. Step 2: Convert to fraction form
    12,904.67/19,328.11 = 11,217.17/x
  3. Step 3: Cross multiply
    12,904.67x = 19,328.11 × 11,217.17
  4. Step 4: Simplify right side
    12,904.67x = 216,806,695.65
  5. Step 5: Solve for x
    x = 216,806,695.65/12,904.67
  6. Step 6: Final answer
    x = 16,800.64

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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.