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Finding the Fourth Proportional to 22,178.76, 30,611.70 and 15,108

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Solution

The fourth proportional to 22,178.76, 30,611.70 and 15,108 is: 20,852.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,178.76 : 30,611.70 = 15,108 : x
  2. Step 2: Convert to fraction form
    22,178.76/30,611.70 = 15,108/x
  3. Step 3: Cross multiply
    22,178.76x = 30,611.70 × 15,108
  4. Step 4: Simplify right side
    22,178.76x = 462,481,563.60
  5. Step 5: Solve for x
    x = 462,481,563.60/22,178.76
  6. Step 6: Final answer
    x = 20,852.45

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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.