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Finding the Fourth Proportional to 7,858.56, 10,845.12 and 4,321.70

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Solution

The fourth proportional to 7,858.56, 10,845.12 and 4,321.70 is: 5,964.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.56 : 10,845.12 = 4,321.70 : x
  2. Step 2: Convert to fraction form
    7,858.56/10,845.12 = 4,321.70/x
  3. Step 3: Cross multiply
    7,858.56x = 10,845.12 × 4,321.70
  4. Step 4: Simplify right side
    7,858.56x = 46,869,355.10
  5. Step 5: Solve for x
    x = 46,869,355.10/7,858.56
  6. Step 6: Final answer
    x = 5,964.11

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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.