Home / 20,788.10-28,687.58-11,228.00

Finding the Fourth Proportional to 20,788.10, 28,687.58 and 11,228.00

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Solution

The fourth proportional to 20,788.10, 28,687.58 and 11,228.00 is: 15,494.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.10 : 28,687.58 = 11,228.00 : x
  2. Step 2: Convert to fraction form
    20,788.10/28,687.58 = 11,228.00/x
  3. Step 3: Cross multiply
    20,788.10x = 28,687.58 × 11,228.00
  4. Step 4: Simplify right side
    20,788.10x = 322,103,948.66
  5. Step 5: Solve for x
    x = 322,103,948.66/20,788.10
  6. Step 6: Final answer
    x = 15,494.64

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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.