Home / 31,658.85-43,688.97-18,917.55

Finding the Fourth Proportional to 31,658.85, 43,688.97 and 18,917.55

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Solution

The fourth proportional to 31,658.85, 43,688.97 and 18,917.55 is: 26,106.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,658.85 : 43,688.97 = 18,917.55 : x
  2. Step 2: Convert to fraction form
    31,658.85/43,688.97 = 18,917.55/x
  3. Step 3: Cross multiply
    31,658.85x = 43,688.97 × 18,917.55
  4. Step 4: Simplify right side
    31,658.85x = 826,488,274.42
  5. Step 5: Solve for x
    x = 826,488,274.42/31,658.85
  6. Step 6: Final answer
    x = 26,106.07

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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.