Home / 31,658.15-43,688.69-18,231.80

Finding the Fourth Proportional to 31,658.15, 43,688.69 and 18,231.80

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Solution

The fourth proportional to 31,658.15, 43,688.69 and 18,231.80 is: 25,160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,658.15 : 43,688.69 = 18,231.80 : x
  2. Step 2: Convert to fraction form
    31,658.15/43,688.69 = 18,231.80/x
  3. Step 3: Cross multiply
    31,658.15x = 43,688.69 × 18,231.80
  4. Step 4: Simplify right side
    31,658.15x = 796,523,148.74
  5. Step 5: Solve for x
    x = 796,523,148.74/31,658.15
  6. Step 6: Final answer
    x = 25,160.13

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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.