Home / 20,342.71-28,072.12-11,845.08

Finding the Fourth Proportional to 20,342.71, 28,072.12 and 11,845.08

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Solution

The fourth proportional to 20,342.71, 28,072.12 and 11,845.08 is: 16,345.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.71 : 28,072.12 = 11,845.08 : x
  2. Step 2: Convert to fraction form
    20,342.71/28,072.12 = 11,845.08/x
  3. Step 3: Cross multiply
    20,342.71x = 28,072.12 × 11,845.08
  4. Step 4: Simplify right side
    20,342.71x = 332,516,507.17
  5. Step 5: Solve for x
    x = 332,516,507.17/20,342.71
  6. Step 6: Final answer
    x = 16,345.73

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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.