Home / 20,843.60-28,764.12-11,412.08

Finding the Fourth Proportional to 20,843.60, 28,764.12 and 11,412.08

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Solution

The fourth proportional to 20,843.60, 28,764.12 and 11,412.08 is: 15,748.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.60 : 28,764.12 = 11,412.08 : x
  2. Step 2: Convert to fraction form
    20,843.60/28,764.12 = 11,412.08/x
  3. Step 3: Cross multiply
    20,843.60x = 28,764.12 × 11,412.08
  4. Step 4: Simplify right side
    20,843.60x = 328,258,438.57
  5. Step 5: Solve for x
    x = 328,258,438.57/20,843.60
  6. Step 6: Final answer
    x = 15,748.64

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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.