Home / 13,188.21-18,199.71-7,220.00

Finding the Fourth Proportional to 13,188.21, 18,199.71 and 7,220.00

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Solution

The fourth proportional to 13,188.21, 18,199.71 and 7,220.00 is: 9,963.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.21 : 18,199.71 = 7,220.00 : x
  2. Step 2: Convert to fraction form
    13,188.21/18,199.71 = 7,220.00/x
  3. Step 3: Cross multiply
    13,188.21x = 18,199.71 × 7,220.00
  4. Step 4: Simplify right side
    13,188.21x = 131,401,815.20
  5. Step 5: Solve for x
    x = 131,401,815.20/13,188.21
  6. Step 6: Final answer
    x = 9,963.58

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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.