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Finding the Fourth Proportional to 6,151.61, 8,487.90 and 3,912.68

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Solution

The fourth proportional to 6,151.61, 8,487.90 and 3,912.68 is: 5,398.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,151.61 : 8,487.90 = 3,912.68 : x
  2. Step 2: Convert to fraction form
    6,151.61/8,487.90 = 3,912.68/x
  3. Step 3: Cross multiply
    6,151.61x = 8,487.90 × 3,912.68
  4. Step 4: Simplify right side
    6,151.61x = 33,210,457.79
  5. Step 5: Solve for x
    x = 33,210,457.79/6,151.61
  6. Step 6: Final answer
    x = 5,398.66

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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.