Home / 31,438.10-43,354.92-20,663.94

Finding the Fourth Proportional to 31,438.10, 43,354.92 and 20,663.94

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Solution

The fourth proportional to 31,438.10, 43,354.92 and 20,663.94 is: 28,496.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.10 : 43,354.92 = 20,663.94 : x
  2. Step 2: Convert to fraction form
    31,438.10/43,354.92 = 20,663.94/x
  3. Step 3: Cross multiply
    31,438.10x = 43,354.92 × 20,663.94
  4. Step 4: Simplify right side
    31,438.10x = 895,883,461.78
  5. Step 5: Solve for x
    x = 895,883,461.78/31,438.10
  6. Step 6: Final answer
    x = 28,496.74

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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.