Home / 13,221.44-18,239.28-7,915.23

Finding the Fourth Proportional to 13,221.44, 18,239.28 and 7,915.23

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Solution

The fourth proportional to 13,221.44, 18,239.28 and 7,915.23 is: 10,919.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.44 : 18,239.28 = 7,915.23 : x
  2. Step 2: Convert to fraction form
    13,221.44/18,239.28 = 7,915.23/x
  3. Step 3: Cross multiply
    13,221.44x = 18,239.28 × 7,915.23
  4. Step 4: Simplify right side
    13,221.44x = 144,368,096.23
  5. Step 5: Solve for x
    x = 144,368,096.23/13,221.44
  6. Step 6: Final answer
    x = 10,919.25

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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.