Home / 20,856.69-28,784.97-11,902.14

Finding the Fourth Proportional to 20,856.69, 28,784.97 and 11,902.14

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Solution

The fourth proportional to 20,856.69, 28,784.97 and 11,902.14 is: 16,426.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.69 : 28,784.97 = 11,902.14 : x
  2. Step 2: Convert to fraction form
    20,856.69/28,784.97 = 11,902.14/x
  3. Step 3: Cross multiply
    20,856.69x = 28,784.97 × 11,902.14
  4. Step 4: Simplify right side
    20,856.69x = 342,602,742.84
  5. Step 5: Solve for x
    x = 342,602,742.84/20,856.69
  6. Step 6: Final answer
    x = 16,426.52

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Double scale
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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.