Home / 20,909.25-31,374.63-13,894.11

Finding the Fourth Proportional to 20,909.25, 31,374.63 and 13,894.11

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Solution

The fourth proportional to 20,909.25, 31,374.63 and 13,894.11 is: 20,848.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.25 : 31,374.63 = 13,894.11 : x
  2. Step 2: Convert to fraction form
    20,909.25/31,374.63 = 13,894.11/x
  3. Step 3: Cross multiply
    20,909.25x = 31,374.63 × 13,894.11
  4. Step 4: Simplify right side
    20,909.25x = 435,922,560.43
  5. Step 5: Solve for x
    x = 435,922,560.43/20,909.25
  6. Step 6: Final answer
    x = 20,848.31

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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.