Home / 13,218.44-18,235.15-7,912.22

Finding the Fourth Proportional to 13,218.44, 18,235.15 and 7,912.22

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Solution

The fourth proportional to 13,218.44, 18,235.15 and 7,912.22 is: 10,915.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.44 : 18,235.15 = 7,912.22 : x
  2. Step 2: Convert to fraction form
    13,218.44/18,235.15 = 7,912.22/x
  3. Step 3: Cross multiply
    13,218.44x = 18,235.15 × 7,912.22
  4. Step 4: Simplify right side
    13,218.44x = 144,280,544.34
  5. Step 5: Solve for x
    x = 144,280,544.34/13,218.44
  6. Step 6: Final answer
    x = 10,915.10

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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.