Home / 21,152.70-29,156.85-16,669.02

Finding the Fourth Proportional to 21,152.70, 29,156.85 and 16,669.02

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Solution

The fourth proportional to 21,152.70, 29,156.85 and 16,669.02 is: 22,976.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.70 : 29,156.85 = 16,669.02 : x
  2. Step 2: Convert to fraction form
    21,152.70/29,156.85 = 16,669.02/x
  3. Step 3: Cross multiply
    21,152.70x = 29,156.85 × 16,669.02
  4. Step 4: Simplify right side
    21,152.70x = 486,016,115.79
  5. Step 5: Solve for x
    x = 486,016,115.79/21,152.70
  6. Step 6: Final answer
    x = 22,976.55

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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.