Home / 13,188.40-18,199.96-7,220.02

Finding the Fourth Proportional to 13,188.40, 18,199.96 and 7,220.02

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Solution

The fourth proportional to 13,188.40, 18,199.96 and 7,220.02 is: 9,963.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.40 : 18,199.96 = 7,220.02 : x
  2. Step 2: Convert to fraction form
    13,188.40/18,199.96 = 7,220.02/x
  3. Step 3: Cross multiply
    13,188.40x = 18,199.96 × 7,220.02
  4. Step 4: Simplify right side
    13,188.40x = 131,404,045.77
  5. Step 5: Solve for x
    x = 131,404,045.77/13,188.40
  6. Step 6: Final answer
    x = 9,963.61

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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.