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Finding the Fourth Proportional to 9,391.60, 12,946.56 and 7,149.56

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Solution

The fourth proportional to 9,391.60, 12,946.56 and 7,149.56 is: 9,855.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,391.60 : 12,946.56 = 7,149.56 : x
  2. Step 2: Convert to fraction form
    9,391.60/12,946.56 = 7,149.56/x
  3. Step 3: Cross multiply
    9,391.60x = 12,946.56 × 7,149.56
  4. Step 4: Simplify right side
    9,391.60x = 92,562,207.51
  5. Step 5: Solve for x
    x = 92,562,207.51/9,391.60
  6. Step 6: Final answer
    x = 9,855.85

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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.