Home / 20,941.25-28,885.95-13,772

Finding the Fourth Proportional to 20,941.25, 28,885.95 and 13,772

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Solution

The fourth proportional to 20,941.25, 28,885.95 and 13,772 is: 18,996.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.25 : 28,885.95 = 13,772 : x
  2. Step 2: Convert to fraction form
    20,941.25/28,885.95 = 13,772/x
  3. Step 3: Cross multiply
    20,941.25x = 28,885.95 × 13,772
  4. Step 4: Simplify right side
    20,941.25x = 397,817,303.40
  5. Step 5: Solve for x
    x = 397,817,303.40/20,941.25
  6. Step 6: Final answer
    x = 18,996.83

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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.