Home / 18,972.90-28,467.45-9,107.10

Finding the Fourth Proportional to 18,972.90, 28,467.45 and 9,107.10

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Solution

The fourth proportional to 18,972.90, 28,467.45 and 9,107.10 is: 13,664.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.90 : 28,467.45 = 9,107.10 : x
  2. Step 2: Convert to fraction form
    18,972.90/28,467.45 = 9,107.10/x
  3. Step 3: Cross multiply
    18,972.90x = 28,467.45 × 9,107.10
  4. Step 4: Simplify right side
    18,972.90x = 259,255,913.90
  5. Step 5: Solve for x
    x = 259,255,913.90/18,972.90
  6. Step 6: Final answer
    x = 13,664.54

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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.