Home / 13,129.34-18,118.64-7,160.99

Finding the Fourth Proportional to 13,129.34, 18,118.64 and 7,160.99

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Solution

The fourth proportional to 13,129.34, 18,118.64 and 7,160.99 is: 9,882.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.34 : 18,118.64 = 7,160.99 : x
  2. Step 2: Convert to fraction form
    13,129.34/18,118.64 = 7,160.99/x
  3. Step 3: Cross multiply
    13,129.34x = 18,118.64 × 7,160.99
  4. Step 4: Simplify right side
    13,129.34x = 129,747,399.85
  5. Step 5: Solve for x
    x = 129,747,399.85/13,129.34
  6. Step 6: Final answer
    x = 9,882.25

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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.