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Finding the Fourth Proportional to 28,479.48, 42,734.64 and 11,850.96

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Solution

The fourth proportional to 28,479.48, 42,734.64 and 11,850.96 is: 17,782.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.48 : 42,734.64 = 11,850.96 : x
  2. Step 2: Convert to fraction form
    28,479.48/42,734.64 = 11,850.96/x
  3. Step 3: Cross multiply
    28,479.48x = 42,734.64 × 11,850.96
  4. Step 4: Simplify right side
    28,479.48x = 506,446,509.25
  5. Step 5: Solve for x
    x = 506,446,509.25/28,479.48
  6. Step 6: Final answer
    x = 17,782.86

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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.