Home / 13,130.44-18,118.98-7,161.76

Finding the Fourth Proportional to 13,130.44, 18,118.98 and 7,161.76

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Solution

The fourth proportional to 13,130.44, 18,118.98 and 7,161.76 is: 9,882.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.44 : 18,118.98 = 7,161.76 : x
  2. Step 2: Convert to fraction form
    13,130.44/18,118.98 = 7,161.76/x
  3. Step 3: Cross multiply
    13,130.44x = 18,118.98 × 7,161.76
  4. Step 4: Simplify right side
    13,130.44x = 129,763,786.20
  5. Step 5: Solve for x
    x = 129,763,786.20/13,130.44
  6. Step 6: Final answer
    x = 9,882.67

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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.