Home / 20,913.25-31,380.63-13,898.11

Finding the Fourth Proportional to 20,913.25, 31,380.63 and 13,898.11

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Solution

The fourth proportional to 20,913.25, 31,380.63 and 13,898.11 is: 20,854.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.25 : 31,380.63 = 13,898.11 : x
  2. Step 2: Convert to fraction form
    20,913.25/31,380.63 = 13,898.11/x
  3. Step 3: Cross multiply
    20,913.25x = 31,380.63 × 13,898.11
  4. Step 4: Simplify right side
    20,913.25x = 436,131,447.61
  5. Step 5: Solve for x
    x = 436,131,447.61/20,913.25
  6. Step 6: Final answer
    x = 20,854.31

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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.