Home / 31,732.10-43,776.21-20,399.49

Finding the Fourth Proportional to 31,732.10, 43,776.21 and 20,399.49

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Solution

The fourth proportional to 31,732.10, 43,776.21 and 20,399.49 is: 28,142.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,732.10 : 43,776.21 = 20,399.49 : x
  2. Step 2: Convert to fraction form
    31,732.10/43,776.21 = 20,399.49/x
  3. Step 3: Cross multiply
    31,732.10x = 43,776.21 × 20,399.49
  4. Step 4: Simplify right side
    31,732.10x = 893,012,256.14
  5. Step 5: Solve for x
    x = 893,012,256.14/31,732.10
  6. Step 6: Final answer
    x = 28,142.24

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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.