Home / 31,613.70-43,576.23-21,401.51

Finding the Fourth Proportional to 31,613.70, 43,576.23 and 21,401.51

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Solution

The fourth proportional to 31,613.70, 43,576.23 and 21,401.51 is: 29,499.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,613.70 : 43,576.23 = 21,401.51 : x
  2. Step 2: Convert to fraction form
    31,613.70/43,576.23 = 21,401.51/x
  3. Step 3: Cross multiply
    31,613.70x = 43,576.23 × 21,401.51
  4. Step 4: Simplify right side
    31,613.70x = 932,596,904.23
  5. Step 5: Solve for x
    x = 932,596,904.23/31,613.70
  6. Step 6: Final answer
    x = 29,499.78

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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.