Home / 20,911.17-28,856.43-11,350.85

Finding the Fourth Proportional to 20,911.17, 28,856.43 and 11,350.85

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Solution

The fourth proportional to 20,911.17, 28,856.43 and 11,350.85 is: 15,663.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.17 : 28,856.43 = 11,350.85 : x
  2. Step 2: Convert to fraction form
    20,911.17/28,856.43 = 11,350.85/x
  3. Step 3: Cross multiply
    20,911.17x = 28,856.43 × 11,350.85
  4. Step 4: Simplify right side
    20,911.17x = 327,544,864.18
  5. Step 5: Solve for x
    x = 327,544,864.18/20,911.17
  6. Step 6: Final answer
    x = 15,663.63

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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.