Home / 20,648.34-28,494.72-11,217.06

Finding the Fourth Proportional to 20,648.34, 28,494.72 and 11,217.06

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Solution

The fourth proportional to 20,648.34, 28,494.72 and 11,217.06 is: 15,479.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.34 : 28,494.72 = 11,217.06 : x
  2. Step 2: Convert to fraction form
    20,648.34/28,494.72 = 11,217.06/x
  3. Step 3: Cross multiply
    20,648.34x = 28,494.72 × 11,217.06
  4. Step 4: Simplify right side
    20,648.34x = 319,626,983.92
  5. Step 5: Solve for x
    x = 319,626,983.92/20,648.34
  6. Step 6: Final answer
    x = 15,479.55

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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.