Home / 18,920.12-28,370.55-11,025.14

Finding the Fourth Proportional to 18,920.12, 28,370.55 and 11,025.14

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Solution

The fourth proportional to 18,920.12, 28,370.55 and 11,025.14 is: 16,532.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.12 : 28,370.55 = 11,025.14 : x
  2. Step 2: Convert to fraction form
    18,920.12/28,370.55 = 11,025.14/x
  3. Step 3: Cross multiply
    18,920.12x = 28,370.55 × 11,025.14
  4. Step 4: Simplify right side
    18,920.12x = 312,789,285.63
  5. Step 5: Solve for x
    x = 312,789,285.63/18,920.12
  6. Step 6: Final answer
    x = 16,532.10

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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.