Home / 21,241.36-31,826.40-13,834.72

Finding the Fourth Proportional to 21,241.36, 31,826.40 and 13,834.72

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Solution

The fourth proportional to 21,241.36, 31,826.40 and 13,834.72 is: 20,728.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.36 : 31,826.40 = 13,834.72 : x
  2. Step 2: Convert to fraction form
    21,241.36/31,826.40 = 13,834.72/x
  3. Step 3: Cross multiply
    21,241.36x = 31,826.40 × 13,834.72
  4. Step 4: Simplify right side
    21,241.36x = 440,309,332.61
  5. Step 5: Solve for x
    x = 440,309,332.61/21,241.36
  6. Step 6: Final answer
    x = 20,728.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.