Home / 15,319.86-22,979.91-8,390.58

Finding the Fourth Proportional to 15,319.86, 22,979.91 and 8,390.58

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Solution

The fourth proportional to 15,319.86, 22,979.91 and 8,390.58 is: 12,585.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.86 : 22,979.91 = 8,390.58 : x
  2. Step 2: Convert to fraction form
    15,319.86/22,979.91 = 8,390.58/x
  3. Step 3: Cross multiply
    15,319.86x = 22,979.91 × 8,390.58
  4. Step 4: Simplify right side
    15,319.86x = 192,814,773.25
  5. Step 5: Solve for x
    x = 192,814,773.25/15,319.86
  6. Step 6: Final answer
    x = 12,585.94

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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.