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Finding the Fourth Proportional to 9,357.63, 12,900.57 and 6,520.91

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Solution

The fourth proportional to 9,357.63, 12,900.57 and 6,520.91 is: 8,989.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,357.63 : 12,900.57 = 6,520.91 : x
  2. Step 2: Convert to fraction form
    9,357.63/12,900.57 = 6,520.91/x
  3. Step 3: Cross multiply
    9,357.63x = 12,900.57 × 6,520.91
  4. Step 4: Simplify right side
    9,357.63x = 84,123,366.96
  5. Step 5: Solve for x
    x = 84,123,366.96/9,357.63
  6. Step 6: Final answer
    x = 8,989.82

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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.