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Finding the Fourth Proportional to 9,145.52, 12,620.86 and 4,953.78

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Solution

The fourth proportional to 9,145.52, 12,620.86 and 4,953.78 is: 6,836.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,145.52 : 12,620.86 = 4,953.78 : x
  2. Step 2: Convert to fraction form
    9,145.52/12,620.86 = 4,953.78/x
  3. Step 3: Cross multiply
    9,145.52x = 12,620.86 × 4,953.78
  4. Step 4: Simplify right side
    9,145.52x = 62,520,963.85
  5. Step 5: Solve for x
    x = 62,520,963.85/9,145.52
  6. Step 6: Final answer
    x = 6,836.24

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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.