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Finding the Fourth Proportional to 19,869.22, 29,806.67 and 7,388.20

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Solution

The fourth proportional to 19,869.22, 29,806.67 and 7,388.20 is: 11,083.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.22 : 29,806.67 = 7,388.20 : x
  2. Step 2: Convert to fraction form
    19,869.22/29,806.67 = 7,388.20/x
  3. Step 3: Cross multiply
    19,869.22x = 29,806.67 × 7,388.20
  4. Step 4: Simplify right side
    19,869.22x = 220,217,639.29
  5. Step 5: Solve for x
    x = 220,217,639.29/19,869.22
  6. Step 6: Final answer
    x = 11,083.36

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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.