Home / 21,856.18-32,828.43-13,107.70

Finding the Fourth Proportional to 21,856.18, 32,828.43 and 13,107.70

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Solution

The fourth proportional to 21,856.18, 32,828.43 and 13,107.70 is: 19,688.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856.18 : 32,828.43 = 13,107.70 : x
  2. Step 2: Convert to fraction form
    21,856.18/32,828.43 = 13,107.70/x
  3. Step 3: Cross multiply
    21,856.18x = 32,828.43 × 13,107.70
  4. Step 4: Simplify right side
    21,856.18x = 430,305,211.91
  5. Step 5: Solve for x
    x = 430,305,211.91/21,856.18
  6. Step 6: Final answer
    x = 19,688.03

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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.