Home / 20,815.74-28,725.84-12,317.76

Finding the Fourth Proportional to 20,815.74, 28,725.84 and 12,317.76

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Solution

The fourth proportional to 20,815.74, 28,725.84 and 12,317.76 is: 16,998.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.74 : 28,725.84 = 12,317.76 : x
  2. Step 2: Convert to fraction form
    20,815.74/28,725.84 = 12,317.76/x
  3. Step 3: Cross multiply
    20,815.74x = 28,725.84 × 12,317.76
  4. Step 4: Simplify right side
    20,815.74x = 353,838,002.92
  5. Step 5: Solve for x
    x = 353,838,002.92/20,815.74
  6. Step 6: Final answer
    x = 16,998.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.