Home / 13,972.31-19,285.88-8,311.04

Finding the Fourth Proportional to 13,972.31, 19,285.88 and 8,311.04

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Solution

The fourth proportional to 13,972.31, 19,285.88 and 8,311.04 is: 11,471.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,972.31 : 19,285.88 = 8,311.04 : x
  2. Step 2: Convert to fraction form
    13,972.31/19,285.88 = 8,311.04/x
  3. Step 3: Cross multiply
    13,972.31x = 19,285.88 × 8,311.04
  4. Step 4: Simplify right side
    13,972.31x = 160,285,720.12
  5. Step 5: Solve for x
    x = 160,285,720.12/13,972.31
  6. Step 6: Final answer
    x = 11,471.67

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1.5x scale

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.