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Finding the Fourth Proportional to 17,808.68, 26,715.45 and 7,418

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Solution

The fourth proportional to 17,808.68, 26,715.45 and 7,418 is: 11,128.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,808.68 : 26,715.45 = 7,418 : x
  2. Step 2: Convert to fraction form
    17,808.68/26,715.45 = 7,418/x
  3. Step 3: Cross multiply
    17,808.68x = 26,715.45 × 7,418
  4. Step 4: Simplify right side
    17,808.68x = 198,175,208.10
  5. Step 5: Solve for x
    x = 198,175,208.10/17,808.68
  6. Step 6: Final answer
    x = 11,128.01

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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.