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Finding the Fourth Proportional to 28,442.45, 42,669.89 and 8,722.54

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Solution

The fourth proportional to 28,442.45, 42,669.89 and 8,722.54 is: 13,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.45 : 42,669.89 = 8,722.54 : x
  2. Step 2: Convert to fraction form
    28,442.45/42,669.89 = 8,722.54/x
  3. Step 3: Cross multiply
    28,442.45x = 42,669.89 × 8,722.54
  4. Step 4: Simplify right side
    28,442.45x = 372,189,822.32
  5. Step 5: Solve for x
    x = 372,189,822.32/28,442.45
  6. Step 6: Final answer
    x = 13,085.72

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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.