Home / 31,238.36-43,126.76-20,658.68

Finding the Fourth Proportional to 31,238.36, 43,126.76 and 20,658.68

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Solution

The fourth proportional to 31,238.36, 43,126.76 and 20,658.68 is: 28,520.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,238.36 : 43,126.76 = 20,658.68 : x
  2. Step 2: Convert to fraction form
    31,238.36/43,126.76 = 20,658.68/x
  3. Step 3: Cross multiply
    31,238.36x = 43,126.76 × 20,658.68
  4. Step 4: Simplify right side
    31,238.36x = 890,941,934.28
  5. Step 5: Solve for x
    x = 890,941,934.28/31,238.36
  6. Step 6: Final answer
    x = 28,520.77

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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.