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Finding the Fourth Proportional to 17,911.68, 26,860.50 and 10,518

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Solution

The fourth proportional to 17,911.68, 26,860.50 and 10,518 is: 15,772.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,911.68 : 26,860.50 = 10,518 : x
  2. Step 2: Convert to fraction form
    17,911.68/26,860.50 = 10,518/x
  3. Step 3: Cross multiply
    17,911.68x = 26,860.50 × 10,518
  4. Step 4: Simplify right side
    17,911.68x = 282,518,739
  5. Step 5: Solve for x
    x = 282,518,739/17,911.68
  6. Step 6: Final answer
    x = 15,772.88

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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.