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Finding the Fourth Proportional to 9,135.78, 12,606.03 and 5,357.52

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Solution

The fourth proportional to 9,135.78, 12,606.03 and 5,357.52 is: 7,392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.78 : 12,606.03 = 5,357.52 : x
  2. Step 2: Convert to fraction form
    9,135.78/12,606.03 = 5,357.52/x
  3. Step 3: Cross multiply
    9,135.78x = 12,606.03 × 5,357.52
  4. Step 4: Simplify right side
    9,135.78x = 67,537,057.85
  5. Step 5: Solve for x
    x = 67,537,057.85/9,135.78
  6. Step 6: Final answer
    x = 7,392.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.