Home / 13,161.17-18,160.13-7,855.67

Finding the Fourth Proportional to 13,161.17, 18,160.13 and 7,855.67

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Solution

The fourth proportional to 13,161.17, 18,160.13 and 7,855.67 is: 10,839.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.17 : 18,160.13 = 7,855.67 : x
  2. Step 2: Convert to fraction form
    13,161.17/18,160.13 = 7,855.67/x
  3. Step 3: Cross multiply
    13,161.17x = 18,160.13 × 7,855.67
  4. Step 4: Simplify right side
    13,161.17x = 142,659,949.16
  5. Step 5: Solve for x
    x = 142,659,949.16/13,161.17
  6. Step 6: Final answer
    x = 10,839.46

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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.