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Finding the Fourth Proportional to 17,855.95, 26,780.07 and 7,315.63

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Solution

The fourth proportional to 17,855.95, 26,780.07 and 7,315.63 is: 10,971.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,855.95 : 26,780.07 = 7,315.63 : x
  2. Step 2: Convert to fraction form
    17,855.95/26,780.07 = 7,315.63/x
  3. Step 3: Cross multiply
    17,855.95x = 26,780.07 × 7,315.63
  4. Step 4: Simplify right side
    17,855.95x = 195,913,016.54
  5. Step 5: Solve for x
    x = 195,913,016.54/17,855.95
  6. Step 6: Final answer
    x = 10,971.86

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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.