Home / 13,111.28-18,093.14-7,142.88

Finding the Fourth Proportional to 13,111.28, 18,093.14 and 7,142.88

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Solution

The fourth proportional to 13,111.28, 18,093.14 and 7,142.88 is: 9,856.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.28 : 18,093.14 = 7,142.88 : x
  2. Step 2: Convert to fraction form
    13,111.28/18,093.14 = 7,142.88/x
  3. Step 3: Cross multiply
    13,111.28x = 18,093.14 × 7,142.88
  4. Step 4: Simplify right side
    13,111.28x = 129,237,127.84
  5. Step 5: Solve for x
    x = 129,237,127.84/13,111.28
  6. Step 6: Final answer
    x = 9,856.94

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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.