Home / 20,606.76-28,404.14-13,890.24

Finding the Fourth Proportional to 20,606.76, 28,404.14 and 13,890.24

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Solution

The fourth proportional to 20,606.76, 28,404.14 and 13,890.24 is: 19,146.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.76 : 28,404.14 = 13,890.24 : x
  2. Step 2: Convert to fraction form
    20,606.76/28,404.14 = 13,890.24/x
  3. Step 3: Cross multiply
    20,606.76x = 28,404.14 × 13,890.24
  4. Step 4: Simplify right side
    20,606.76x = 394,540,252.14
  5. Step 5: Solve for x
    x = 394,540,252.14/20,606.76
  6. Step 6: Final answer
    x = 19,146.16

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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.