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Finding the Fourth Proportional to 21,961.80, 32,942.70 and 10,870.20

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Solution

The fourth proportional to 21,961.80, 32,942.70 and 10,870.20 is: 16,305.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.80 : 32,942.70 = 10,870.20 : x
  2. Step 2: Convert to fraction form
    21,961.80/32,942.70 = 10,870.20/x
  3. Step 3: Cross multiply
    21,961.80x = 32,942.70 × 10,870.20
  4. Step 4: Simplify right side
    21,961.80x = 358,093,737.54
  5. Step 5: Solve for x
    x = 358,093,737.54/21,961.80
  6. Step 6: Final answer
    x = 16,305.30

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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.