Home / 18,959.93-28,455.38-13,418.65

Finding the Fourth Proportional to 18,959.93, 28,455.38 and 13,418.65

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Solution

The fourth proportional to 18,959.93, 28,455.38 and 13,418.65 is: 20,138.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.93 : 28,455.38 = 13,418.65 : x
  2. Step 2: Convert to fraction form
    18,959.93/28,455.38 = 13,418.65/x
  3. Step 3: Cross multiply
    18,959.93x = 28,455.38 × 13,418.65
  4. Step 4: Simplify right side
    18,959.93x = 381,832,784.84
  5. Step 5: Solve for x
    x = 381,832,784.84/18,959.93
  6. Step 6: Final answer
    x = 20,138.93

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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.