Home / 20,788.10-28,686.93-11,836.88

Finding the Fourth Proportional to 20,788.10, 28,686.93 and 11,836.88

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Solution

The fourth proportional to 20,788.10, 28,686.93 and 11,836.88 is: 16,334.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.10 : 28,686.93 = 11,836.88 : x
  2. Step 2: Convert to fraction form
    20,788.10/28,686.93 = 11,836.88/x
  3. Step 3: Cross multiply
    20,788.10x = 28,686.93 × 11,836.88
  4. Step 4: Simplify right side
    20,788.10x = 339,563,720.65
  5. Step 5: Solve for x
    x = 339,563,720.65/20,788.10
  6. Step 6: Final answer
    x = 16,334.53

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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.