Home / 13,111.68-18,094.13-7,143.36

Finding the Fourth Proportional to 13,111.68, 18,094.13 and 7,143.36

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Solution

The fourth proportional to 13,111.68, 18,094.13 and 7,143.36 is: 9,857.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.68 : 18,094.13 = 7,143.36 : x
  2. Step 2: Convert to fraction form
    13,111.68/18,094.13 = 7,143.36/x
  3. Step 3: Cross multiply
    13,111.68x = 18,094.13 × 7,143.36
  4. Step 4: Simplify right side
    13,111.68x = 129,252,884.48
  5. Step 5: Solve for x
    x = 129,252,884.48/13,111.68
  6. Step 6: Final answer
    x = 9,857.84

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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.