Home / 13,189.12-18,200.43-7,220.63

Finding the Fourth Proportional to 13,189.12, 18,200.43 and 7,220.63

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Solution

The fourth proportional to 13,189.12, 18,200.43 and 7,220.63 is: 9,964.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.12 : 18,200.43 = 7,220.63 : x
  2. Step 2: Convert to fraction form
    13,189.12/18,200.43 = 7,220.63/x
  3. Step 3: Cross multiply
    13,189.12x = 18,200.43 × 7,220.63
  4. Step 4: Simplify right side
    13,189.12x = 131,418,616.37
  5. Step 5: Solve for x
    x = 131,418,616.37/13,189.12
  6. Step 6: Final answer
    x = 9,964.17

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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.