Home / 20,918.32-28,867.39-11,358.23

Finding the Fourth Proportional to 20,918.32, 28,867.39 and 11,358.23

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Solution

The fourth proportional to 20,918.32, 28,867.39 and 11,358.23 is: 15,674.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.32 : 28,867.39 = 11,358.23 : x
  2. Step 2: Convert to fraction form
    20,918.32/28,867.39 = 11,358.23/x
  3. Step 3: Cross multiply
    20,918.32x = 28,867.39 × 11,358.23
  4. Step 4: Simplify right side
    20,918.32x = 327,882,282.39
  5. Step 5: Solve for x
    x = 327,882,282.39/20,918.32
  6. Step 6: Final answer
    x = 15,674.41

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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.