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Finding the Fourth Proportional to 7,842.66, 11,760.85 and 3,457

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Solution

The fourth proportional to 7,842.66, 11,760.85 and 3,457 is: 5,184.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.66 : 11,760.85 = 3,457 : x
  2. Step 2: Convert to fraction form
    7,842.66/11,760.85 = 3,457/x
  3. Step 3: Cross multiply
    7,842.66x = 11,760.85 × 3,457
  4. Step 4: Simplify right side
    7,842.66x = 40,657,258.45
  5. Step 5: Solve for x
    x = 40,657,258.45/7,842.66
  6. Step 6: Final answer
    x = 5,184.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.