Home / 20,886.28-28,823.70-11,455.48

Finding the Fourth Proportional to 20,886.28, 28,823.70 and 11,455.48

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Solution

The fourth proportional to 20,886.28, 28,823.70 and 11,455.48 is: 15,808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.28 : 28,823.70 = 11,455.48 : x
  2. Step 2: Convert to fraction form
    20,886.28/28,823.70 = 11,455.48/x
  3. Step 3: Cross multiply
    20,886.28x = 28,823.70 × 11,455.48
  4. Step 4: Simplify right side
    20,886.28x = 330,189,318.88
  5. Step 5: Solve for x
    x = 330,189,318.88/20,886.28
  6. Step 6: Final answer
    x = 15,808.91

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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.