Home / 20,645.70-28,490.22-11,214.06

Finding the Fourth Proportional to 20,645.70, 28,490.22 and 11,214.06

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Solution

The fourth proportional to 20,645.70, 28,490.22 and 11,214.06 is: 15,474.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.70 : 28,490.22 = 11,214.06 : x
  2. Step 2: Convert to fraction form
    20,645.70/28,490.22 = 11,214.06/x
  3. Step 3: Cross multiply
    20,645.70x = 28,490.22 × 11,214.06
  4. Step 4: Simplify right side
    20,645.70x = 319,491,036.49
  5. Step 5: Solve for x
    x = 319,491,036.49/20,645.70
  6. Step 6: Final answer
    x = 15,474.94

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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.