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Finding the Fourth Proportional to 20,599.89, 28,428.89 and 11,526.27

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Solution

The fourth proportional to 20,599.89, 28,428.89 and 11,526.27 is: 15,906.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.89 : 28,428.89 = 11,526.27 : x
  2. Step 2: Convert to fraction form
    20,599.89/28,428.89 = 11,526.27/x
  3. Step 3: Cross multiply
    20,599.89x = 28,428.89 × 11,526.27
  4. Step 4: Simplify right side
    20,599.89x = 327,679,004.31
  5. Step 5: Solve for x
    x = 327,679,004.31/20,599.89
  6. Step 6: Final answer
    x = 15,906.83

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1.5x scale

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.