Home / 20,869.28-28,827.24-15,554.88

Finding the Fourth Proportional to 20,869.28, 28,827.24 and 15,554.88

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Solution

The fourth proportional to 20,869.28, 28,827.24 and 15,554.88 is: 21,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.28 : 28,827.24 = 15,554.88 : x
  2. Step 2: Convert to fraction form
    20,869.28/28,827.24 = 15,554.88/x
  3. Step 3: Cross multiply
    20,869.28x = 28,827.24 × 15,554.88
  4. Step 4: Simplify right side
    20,869.28x = 448,404,258.93
  5. Step 5: Solve for x
    x = 448,404,258.93/20,869.28
  6. Step 6: Final answer
    x = 21,486.33

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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.