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Finding the Fourth Proportional to 20,497.89, 28,082.20 and 19,729.99

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Solution

The fourth proportional to 20,497.89, 28,082.20 and 19,729.99 is: 27,030.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,497.89 : 28,082.20 = 19,729.99 : x
  2. Step 2: Convert to fraction form
    20,497.89/28,082.20 = 19,729.99/x
  3. Step 3: Cross multiply
    20,497.89x = 28,082.20 × 19,729.99
  4. Step 4: Simplify right side
    20,497.89x = 554,061,525.18
  5. Step 5: Solve for x
    x = 554,061,525.18/20,497.89
  6. Step 6: Final answer
    x = 27,030.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.