Home / 20,805.40-31,167.90-16,122.76

Finding the Fourth Proportional to 20,805.40, 31,167.90 and 16,122.76

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Solution

The fourth proportional to 20,805.40, 31,167.90 and 16,122.76 is: 24,152.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.40 : 31,167.90 = 16,122.76 : x
  2. Step 2: Convert to fraction form
    20,805.40/31,167.90 = 16,122.76/x
  3. Step 3: Cross multiply
    20,805.40x = 31,167.90 × 16,122.76
  4. Step 4: Simplify right side
    20,805.40x = 502,512,571.40
  5. Step 5: Solve for x
    x = 502,512,571.40/20,805.40
  6. Step 6: Final answer
    x = 24,152.99

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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.