Home / 19,069.91-28,612.73-8,390.78

Finding the Fourth Proportional to 19,069.91, 28,612.73 and 8,390.78

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Solution

The fourth proportional to 19,069.91, 28,612.73 and 8,390.78 is: 12,589.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,069.91 : 28,612.73 = 8,390.78 : x
  2. Step 2: Convert to fraction form
    19,069.91/28,612.73 = 8,390.78/x
  3. Step 3: Cross multiply
    19,069.91x = 28,612.73 × 8,390.78
  4. Step 4: Simplify right side
    19,069.91x = 240,083,122.63
  5. Step 5: Solve for x
    x = 240,083,122.63/19,069.91
  6. Step 6: Final answer
    x = 12,589.63

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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.