Home / 13,105.80-18,086.04-7,137.45

Finding the Fourth Proportional to 13,105.80, 18,086.04 and 7,137.45

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Solution

The fourth proportional to 13,105.80, 18,086.04 and 7,137.45 is: 9,849.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.80 : 18,086.04 = 7,137.45 : x
  2. Step 2: Convert to fraction form
    13,105.80/18,086.04 = 7,137.45/x
  3. Step 3: Cross multiply
    13,105.80x = 18,086.04 × 7,137.45
  4. Step 4: Simplify right side
    13,105.80x = 129,088,206.20
  5. Step 5: Solve for x
    x = 129,088,206.20/13,105.80
  6. Step 6: Final answer
    x = 9,849.70

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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.