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Finding the Fourth Proportional to 21,806.60, 32,706.78 and 7,013.56

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Solution

The fourth proportional to 21,806.60, 32,706.78 and 7,013.56 is: 10,519.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,806.60 : 32,706.78 = 7,013.56 : x
  2. Step 2: Convert to fraction form
    21,806.60/32,706.78 = 7,013.56/x
  3. Step 3: Cross multiply
    21,806.60x = 32,706.78 × 7,013.56
  4. Step 4: Simplify right side
    21,806.60x = 229,390,963.94
  5. Step 5: Solve for x
    x = 229,390,963.94/21,806.60
  6. Step 6: Final answer
    x = 10,519.34

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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.