Home / 12,942.10-17,868.96-9,911.88

Finding the Fourth Proportional to 12,942.10, 17,868.96 and 9,911.88

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Solution

The fourth proportional to 12,942.10, 17,868.96 and 9,911.88 is: 13,685.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942.10 : 17,868.96 = 9,911.88 : x
  2. Step 2: Convert to fraction form
    12,942.10/17,868.96 = 9,911.88/x
  3. Step 3: Cross multiply
    12,942.10x = 17,868.96 × 9,911.88
  4. Step 4: Simplify right side
    12,942.10x = 177,114,987.24
  5. Step 5: Solve for x
    x = 177,114,987.24/12,942.10
  6. Step 6: Final answer
    x = 13,685.18

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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.