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Finding the Fourth Proportional to 7,892.65, 11,840.80 and 2,345.87

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Solution

The fourth proportional to 7,892.65, 11,840.80 and 2,345.87 is: 3,519.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.65 : 11,840.80 = 2,345.87 : x
  2. Step 2: Convert to fraction form
    7,892.65/11,840.80 = 2,345.87/x
  3. Step 3: Cross multiply
    7,892.65x = 11,840.80 × 2,345.87
  4. Step 4: Simplify right side
    7,892.65x = 27,776,977.50
  5. Step 5: Solve for x
    x = 27,776,977.50/7,892.65
  6. Step 6: Final answer
    x = 3,519.35

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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.