Home / 20,918.83-28,867.13-11,358.35

Finding the Fourth Proportional to 20,918.83, 28,867.13 and 11,358.35

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Solution

The fourth proportional to 20,918.83, 28,867.13 and 11,358.35 is: 15,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.83 : 28,867.13 = 11,358.35 : x
  2. Step 2: Convert to fraction form
    20,918.83/28,867.13 = 11,358.35/x
  3. Step 3: Cross multiply
    20,918.83x = 28,867.13 × 11,358.35
  4. Step 4: Simplify right side
    20,918.83x = 327,882,764.91
  5. Step 5: Solve for x
    x = 327,882,764.91/20,918.83
  6. Step 6: Final answer
    x = 15,674.05

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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.