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Finding the Fourth Proportional to 7,861.76, 10,845.60 and 5,068.16

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Solution

The fourth proportional to 7,861.76, 10,845.60 and 5,068.16 is: 6,991.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.76 : 10,845.60 = 5,068.16 : x
  2. Step 2: Convert to fraction form
    7,861.76/10,845.60 = 5,068.16/x
  3. Step 3: Cross multiply
    7,861.76x = 10,845.60 × 5,068.16
  4. Step 4: Simplify right side
    7,861.76x = 54,967,236.10
  5. Step 5: Solve for x
    x = 54,967,236.10/7,861.76
  6. Step 6: Final answer
    x = 6,991.72

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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.