Home / 31,800.78-43,904.12-19,880.27

Finding the Fourth Proportional to 31,800.78, 43,904.12 and 19,880.27

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Solution

The fourth proportional to 31,800.78, 43,904.12 and 19,880.27 is: 27,446.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,800.78 : 43,904.12 = 19,880.27 : x
  2. Step 2: Convert to fraction form
    31,800.78/43,904.12 = 19,880.27/x
  3. Step 3: Cross multiply
    31,800.78x = 43,904.12 × 19,880.27
  4. Step 4: Simplify right side
    31,800.78x = 872,825,440.79
  5. Step 5: Solve for x
    x = 872,825,440.79/31,800.78
  6. Step 6: Final answer
    x = 27,446.67

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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.