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Finding the Fourth Proportional to 11,385.90, 17,074.80 and 5,148.90

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Solution

The fourth proportional to 11,385.90, 17,074.80 and 5,148.90 is: 7,721.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.90 : 17,074.80 = 5,148.90 : x
  2. Step 2: Convert to fraction form
    11,385.90/17,074.80 = 5,148.90/x
  3. Step 3: Cross multiply
    11,385.90x = 17,074.80 × 5,148.90
  4. Step 4: Simplify right side
    11,385.90x = 87,916,437.72
  5. Step 5: Solve for x
    x = 87,916,437.72/11,385.90
  6. Step 6: Final answer
    x = 7,721.52

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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.