Home / 31,688.68-43,698.66-21,078.76

Finding the Fourth Proportional to 31,688.68, 43,698.66 and 21,078.76

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Solution

The fourth proportional to 31,688.68, 43,698.66 and 21,078.76 is: 29,067.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,688.68 : 43,698.66 = 21,078.76 : x
  2. Step 2: Convert to fraction form
    31,688.68/43,698.66 = 21,078.76/x
  3. Step 3: Cross multiply
    31,688.68x = 43,698.66 × 21,078.76
  4. Step 4: Simplify right side
    31,688.68x = 921,113,566.46
  5. Step 5: Solve for x
    x = 921,113,566.46/31,688.68
  6. Step 6: Final answer
    x = 29,067.59

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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.