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Finding the Fourth Proportional to 20,559.84, 30,839.76 and 11,800.32

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Solution

The fourth proportional to 20,559.84, 30,839.76 and 11,800.32 is: 17,700.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.84 : 30,839.76 = 11,800.32 : x
  2. Step 2: Convert to fraction form
    20,559.84/30,839.76 = 11,800.32/x
  3. Step 3: Cross multiply
    20,559.84x = 30,839.76 × 11,800.32
  4. Step 4: Simplify right side
    20,559.84x = 363,919,036.72
  5. Step 5: Solve for x
    x = 363,919,036.72/20,559.84
  6. Step 6: Final answer
    x = 17,700.48

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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.