Home / 31,120,063.92-42,894,288.72-20,803,022.64

Finding the Fourth Proportional to 31,120,063.92, 42,894,288.72 and 20,803,022.64

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Solution

The fourth proportional to 31,120,063.92, 42,894,288.72 and 20,803,022.64 is: 28,673,811.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,120,063.92 : 42,894,288.72 = 20,803,022.64 : x
  2. Step 2: Convert to fraction form
    31,120,063.92/42,894,288.72 = 20,803,022.64/x
  3. Step 3: Cross multiply
    31,120,063.92x = 42,894,288.72 × 20,803,022.64
  4. Step 4: Simplify right side
    31,120,063.92x = 892,330,859,368,856.62
  5. Step 5: Solve for x
    x = 892,330,859,368,856.62/31,120,063.92
  6. Step 6: Final answer
    x = 28,673,811.91

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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.