Home / 20,994.20-28,971.30-11,562.74

Finding the Fourth Proportional to 20,994.20, 28,971.30 and 11,562.74

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Solution

The fourth proportional to 20,994.20, 28,971.30 and 11,562.74 is: 15,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.20 : 28,971.30 = 11,562.74 : x
  2. Step 2: Convert to fraction form
    20,994.20/28,971.30 = 11,562.74/x
  3. Step 3: Cross multiply
    20,994.20x = 28,971.30 × 11,562.74
  4. Step 4: Simplify right side
    20,994.20x = 334,987,609.36
  5. Step 5: Solve for x
    x = 334,987,609.36/20,994.20
  6. Step 6: Final answer
    x = 15,956.20

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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.