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Finding the Fourth Proportional to 7,861.34, 10,847.08 and 4,505.21

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Solution

The fourth proportional to 7,861.34, 10,847.08 and 4,505.21 is: 6,216.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.34 : 10,847.08 = 4,505.21 : x
  2. Step 2: Convert to fraction form
    7,861.34/10,847.08 = 4,505.21/x
  3. Step 3: Cross multiply
    7,861.34x = 10,847.08 × 4,505.21
  4. Step 4: Simplify right side
    7,861.34x = 48,868,334.91
  5. Step 5: Solve for x
    x = 48,868,334.91/7,861.34
  6. Step 6: Final answer
    x = 6,216.28

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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.