Home / 21,856.15-30,163.79-13,363.25

Finding the Fourth Proportional to 21,856.15, 30,163.79 and 13,363.25

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Solution

The fourth proportional to 21,856.15, 30,163.79 and 13,363.25 is: 18,442.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856.15 : 30,163.79 = 13,363.25 : x
  2. Step 2: Convert to fraction form
    21,856.15/30,163.79 = 13,363.25/x
  3. Step 3: Cross multiply
    21,856.15x = 30,163.79 × 13,363.25
  4. Step 4: Simplify right side
    21,856.15x = 403,086,199.90
  5. Step 5: Solve for x
    x = 403,086,199.90/21,856.15
  6. Step 6: Final answer
    x = 18,442.69

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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.