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Finding the Fourth Proportional to 20,706.70, 31,064.10 and 8,860.46

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Solution

The fourth proportional to 20,706.70, 31,064.10 and 8,860.46 is: 13,292.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.70 : 31,064.10 = 8,860.46 : x
  2. Step 2: Convert to fraction form
    20,706.70/31,064.10 = 8,860.46/x
  3. Step 3: Cross multiply
    20,706.70x = 31,064.10 × 8,860.46
  4. Step 4: Simplify right side
    20,706.70x = 275,242,215.49
  5. Step 5: Solve for x
    x = 275,242,215.49/20,706.70
  6. Step 6: Final answer
    x = 13,292.42

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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.