Home / 31,819.68-43,930.89-20,508.66

Finding the Fourth Proportional to 31,819.68, 43,930.89 and 20,508.66

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Solution

The fourth proportional to 31,819.68, 43,930.89 and 20,508.66 is: 28,314.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,819.68 : 43,930.89 = 20,508.66 : x
  2. Step 2: Convert to fraction form
    31,819.68/43,930.89 = 20,508.66/x
  3. Step 3: Cross multiply
    31,819.68x = 43,930.89 × 20,508.66
  4. Step 4: Simplify right side
    31,819.68x = 900,963,686.51
  5. Step 5: Solve for x
    x = 900,963,686.51/31,819.68
  6. Step 6: Final answer
    x = 28,314.67

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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.