Home / 20,648.34-28,494.81-11,216.88

Finding the Fourth Proportional to 20,648.34, 28,494.81 and 11,216.88

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Solution

The fourth proportional to 20,648.34, 28,494.81 and 11,216.88 is: 15,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.34 : 28,494.81 = 11,216.88 : x
  2. Step 2: Convert to fraction form
    20,648.34/28,494.81 = 11,216.88/x
  3. Step 3: Cross multiply
    20,648.34x = 28,494.81 × 11,216.88
  4. Step 4: Simplify right side
    20,648.34x = 319,622,864.39
  5. Step 5: Solve for x
    x = 319,622,864.39/20,648.34
  6. Step 6: Final answer
    x = 15,479.35

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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.