Home / 20,856.17-28,781.97-11,903.49

Finding the Fourth Proportional to 20,856.17, 28,781.97 and 11,903.49

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Solution

The fourth proportional to 20,856.17, 28,781.97 and 11,903.49 is: 16,427.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.17 : 28,781.97 = 11,903.49 : x
  2. Step 2: Convert to fraction form
    20,856.17/28,781.97 = 11,903.49/x
  3. Step 3: Cross multiply
    20,856.17x = 28,781.97 × 11,903.49
  4. Step 4: Simplify right side
    20,856.17x = 342,605,748.17
  5. Step 5: Solve for x
    x = 342,605,748.17/20,856.17
  6. Step 6: Final answer
    x = 16,427.07

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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.