Home / 20,913.28-31,352.64-14,323.12

Finding the Fourth Proportional to 20,913.28, 31,352.64 and 14,323.12

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Solution

The fourth proportional to 20,913.28, 31,352.64 and 14,323.12 is: 21,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.28 : 31,352.64 = 14,323.12 : x
  2. Step 2: Convert to fraction form
    20,913.28/31,352.64 = 14,323.12/x
  3. Step 3: Cross multiply
    20,913.28x = 31,352.64 × 14,323.12
  4. Step 4: Simplify right side
    20,913.28x = 449,067,625.04
  5. Step 5: Solve for x
    x = 449,067,625.04/20,913.28
  6. Step 6: Final answer
    x = 21,472.85

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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.