Home / 13,131.56-18,119.76-7,542.56

Finding the Fourth Proportional to 13,131.56, 18,119.76 and 7,542.56

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Solution

The fourth proportional to 13,131.56, 18,119.76 and 7,542.56 is: 10,407.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.56 : 18,119.76 = 7,542.56 : x
  2. Step 2: Convert to fraction form
    13,131.56/18,119.76 = 7,542.56/x
  3. Step 3: Cross multiply
    13,131.56x = 18,119.76 × 7,542.56
  4. Step 4: Simplify right side
    13,131.56x = 136,669,376.99
  5. Step 5: Solve for x
    x = 136,669,376.99/13,131.56
  6. Step 6: Final answer
    x = 10,407.70

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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.