Home / 13,980.83-20,972.19-5,215.73

Finding the Fourth Proportional to 13,980.83, 20,972.19 and 5,215.73

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Solution

The fourth proportional to 13,980.83, 20,972.19 and 5,215.73 is: 7,823.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.83 : 20,972.19 = 5,215.73 : x
  2. Step 2: Convert to fraction form
    13,980.83/20,972.19 = 5,215.73/x
  3. Step 3: Cross multiply
    13,980.83x = 20,972.19 × 5,215.73
  4. Step 4: Simplify right side
    13,980.83x = 109,385,280.55
  5. Step 5: Solve for x
    x = 109,385,280.55/13,980.83
  6. Step 6: Final answer
    x = 7,823.95

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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.