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Finding the Fourth Proportional to 20,706.70, 28,575.70 and 11,275.26

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Solution

The fourth proportional to 20,706.70, 28,575.70 and 11,275.26 is: 15,560.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.70 : 28,575.70 = 11,275.26 : x
  2. Step 2: Convert to fraction form
    20,706.70/28,575.70 = 11,275.26/x
  3. Step 3: Cross multiply
    20,706.70x = 28,575.70 × 11,275.26
  4. Step 4: Simplify right side
    20,706.70x = 322,198,447.18
  5. Step 5: Solve for x
    x = 322,198,447.18/20,706.70
  6. Step 6: Final answer
    x = 15,560.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.