Home / 13,191.12-18,195.84-8,714.88

Finding the Fourth Proportional to 13,191.12, 18,195.84 and 8,714.88

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Solution

The fourth proportional to 13,191.12, 18,195.84 and 8,714.88 is: 12,021.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.12 : 18,195.84 = 8,714.88 : x
  2. Step 2: Convert to fraction form
    13,191.12/18,195.84 = 8,714.88/x
  3. Step 3: Cross multiply
    13,191.12x = 18,195.84 × 8,714.88
  4. Step 4: Simplify right side
    13,191.12x = 158,574,562.10
  5. Step 5: Solve for x
    x = 158,574,562.10/13,191.12
  6. Step 6: Final answer
    x = 12,021.31

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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.