Home / 20,994.12-28,972.08-11,562.72

Finding the Fourth Proportional to 20,994.12, 28,972.08 and 11,562.72

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Solution

The fourth proportional to 20,994.12, 28,972.08 and 11,562.72 is: 15,956.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.12 : 28,972.08 = 11,562.72 : x
  2. Step 2: Convert to fraction form
    20,994.12/28,972.08 = 11,562.72/x
  3. Step 3: Cross multiply
    20,994.12x = 28,972.08 × 11,562.72
  4. Step 4: Simplify right side
    20,994.12x = 334,996,048.86
  5. Step 5: Solve for x
    x = 334,996,048.86/20,994.12
  6. Step 6: Final answer
    x = 15,956.66

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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.