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Finding the Fourth Proportional to 20,541, 30,767.76 and 19,390.80

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Solution

The fourth proportional to 20,541, 30,767.76 and 19,390.80 is: 29,044.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,541 : 30,767.76 = 19,390.80 : x
  2. Step 2: Convert to fraction form
    20,541/30,767.76 = 19,390.80/x
  3. Step 3: Cross multiply
    20,541x = 30,767.76 × 19,390.80
  4. Step 4: Simplify right side
    20,541x = 596,611,480.61
  5. Step 5: Solve for x
    x = 596,611,480.61/20,541
  6. Step 6: Final answer
    x = 29,044.91

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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.