Home / 20,648.21-28,494.54-11,216.78

Finding the Fourth Proportional to 20,648.21, 28,494.54 and 11,216.78

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Solution

The fourth proportional to 20,648.21, 28,494.54 and 11,216.78 is: 15,479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.21 : 28,494.54 = 11,216.78 : x
  2. Step 2: Convert to fraction form
    20,648.21/28,494.54 = 11,216.78/x
  3. Step 3: Cross multiply
    20,648.21x = 28,494.54 × 11,216.78
  4. Step 4: Simplify right side
    20,648.21x = 319,616,986.38
  5. Step 5: Solve for x
    x = 319,616,986.38/20,648.21
  6. Step 6: Final answer
    x = 15,479.16

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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.