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Finding the Fourth Proportional to 6,390.32, 8,817.30 and 3,737.21

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Solution

The fourth proportional to 6,390.32, 8,817.30 and 3,737.21 is: 5,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.32 : 8,817.30 = 3,737.21 : x
  2. Step 2: Convert to fraction form
    6,390.32/8,817.30 = 3,737.21/x
  3. Step 3: Cross multiply
    6,390.32x = 8,817.30 × 3,737.21
  4. Step 4: Simplify right side
    6,390.32x = 32,952,101.73
  5. Step 5: Solve for x
    x = 32,952,101.73/6,390.32
  6. Step 6: Final answer
    x = 5,156.57

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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.