Home / 12,857.41-17,742.40-7,191.18

Finding the Fourth Proportional to 12,857.41, 17,742.40 and 7,191.18

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Solution

The fourth proportional to 12,857.41, 17,742.40 and 7,191.18 is: 9,923.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.41 : 17,742.40 = 7,191.18 : x
  2. Step 2: Convert to fraction form
    12,857.41/17,742.40 = 7,191.18/x
  3. Step 3: Cross multiply
    12,857.41x = 17,742.40 × 7,191.18
  4. Step 4: Simplify right side
    12,857.41x = 127,588,763.94
  5. Step 5: Solve for x
    x = 127,588,763.94/12,857.41
  6. Step 6: Final answer
    x = 9,923.36

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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.