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Finding the Fourth Proportional to 28,260.52, 42,390.80 and 9,792.52

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Solution

The fourth proportional to 28,260.52, 42,390.80 and 9,792.52 is: 14,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,260.52 : 42,390.80 = 9,792.52 : x
  2. Step 2: Convert to fraction form
    28,260.52/42,390.80 = 9,792.52/x
  3. Step 3: Cross multiply
    28,260.52x = 42,390.80 × 9,792.52
  4. Step 4: Simplify right side
    28,260.52x = 415,112,756.82
  5. Step 5: Solve for x
    x = 415,112,756.82/28,260.52
  6. Step 6: Final answer
    x = 14,688.79

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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.