Home / 21,122.42-29,152.01-12,168.18

Finding the Fourth Proportional to 21,122.42, 29,152.01 and 12,168.18

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Solution

The fourth proportional to 21,122.42, 29,152.01 and 12,168.18 is: 16,793.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.42 : 29,152.01 = 12,168.18 : x
  2. Step 2: Convert to fraction form
    21,122.42/29,152.01 = 12,168.18/x
  3. Step 3: Cross multiply
    21,122.42x = 29,152.01 × 12,168.18
  4. Step 4: Simplify right side
    21,122.42x = 354,726,905.04
  5. Step 5: Solve for x
    x = 354,726,905.04/21,122.42
  6. Step 6: Final answer
    x = 16,793.86

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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.