Home / 20,885.34-28,823.31-11,454.78

Finding the Fourth Proportional to 20,885.34, 28,823.31 and 11,454.78

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Solution

The fourth proportional to 20,885.34, 28,823.31 and 11,454.78 is: 15,808.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.34 : 28,823.31 = 11,454.78 : x
  2. Step 2: Convert to fraction form
    20,885.34/28,823.31 = 11,454.78/x
  3. Step 3: Cross multiply
    20,885.34x = 28,823.31 × 11,454.78
  4. Step 4: Simplify right side
    20,885.34x = 330,164,674.92
  5. Step 5: Solve for x
    x = 330,164,674.92/20,885.34
  6. Step 6: Final answer
    x = 15,808.44

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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.