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Finding the Fourth Proportional to 18,874.74, 28,315.52 and 7,775.26

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Solution

The fourth proportional to 18,874.74, 28,315.52 and 7,775.26 is: 11,664.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.74 : 28,315.52 = 7,775.26 : x
  2. Step 2: Convert to fraction form
    18,874.74/28,315.52 = 7,775.26/x
  3. Step 3: Cross multiply
    18,874.74x = 28,315.52 × 7,775.26
  4. Step 4: Simplify right side
    18,874.74x = 220,160,493.26
  5. Step 5: Solve for x
    x = 220,160,493.26/18,874.74
  6. Step 6: Final answer
    x = 11,664.29

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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.