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Finding the Fourth Proportional to 28,291.98, 42,438.03 and 10,526.54

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Solution

The fourth proportional to 28,291.98, 42,438.03 and 10,526.54 is: 15,789.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.98 : 42,438.03 = 10,526.54 : x
  2. Step 2: Convert to fraction form
    28,291.98/42,438.03 = 10,526.54/x
  3. Step 3: Cross multiply
    28,291.98x = 42,438.03 × 10,526.54
  4. Step 4: Simplify right side
    28,291.98x = 446,725,620.32
  5. Step 5: Solve for x
    x = 446,725,620.32/28,291.98
  6. Step 6: Final answer
    x = 15,789.83

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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.