Home / 13,126.68-18,114.84-7,749.36

Finding the Fourth Proportional to 13,126.68, 18,114.84 and 7,749.36

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Solution

The fourth proportional to 13,126.68, 18,114.84 and 7,749.36 is: 10,694.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.68 : 18,114.84 = 7,749.36 : x
  2. Step 2: Convert to fraction form
    13,126.68/18,114.84 = 7,749.36/x
  3. Step 3: Cross multiply
    13,126.68x = 18,114.84 × 7,749.36
  4. Step 4: Simplify right side
    13,126.68x = 140,378,416.50
  5. Step 5: Solve for x
    x = 140,378,416.50/13,126.68
  6. Step 6: Final answer
    x = 10,694.13

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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.