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Finding the Fourth Proportional to 18,442.30, 27,669.95 and 7,911.89

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Solution

The fourth proportional to 18,442.30, 27,669.95 and 7,911.89 is: 11,870.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,442.30 : 27,669.95 = 7,911.89 : x
  2. Step 2: Convert to fraction form
    18,442.30/27,669.95 = 7,911.89/x
  3. Step 3: Cross multiply
    18,442.30x = 27,669.95 × 7,911.89
  4. Step 4: Simplify right side
    18,442.30x = 218,921,689.66
  5. Step 5: Solve for x
    x = 218,921,689.66/18,442.30
  6. Step 6: Final answer
    x = 11,870.63

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1.5x scale

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.