Home / 13,915.36-20,874.23-7,679.68

Finding the Fourth Proportional to 13,915.36, 20,874.23 and 7,679.68

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Solution

The fourth proportional to 13,915.36, 20,874.23 and 7,679.68 is: 11,520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.36 : 20,874.23 = 7,679.68 : x
  2. Step 2: Convert to fraction form
    13,915.36/20,874.23 = 7,679.68/x
  3. Step 3: Cross multiply
    13,915.36x = 20,874.23 × 7,679.68
  4. Step 4: Simplify right side
    13,915.36x = 160,307,316.06
  5. Step 5: Solve for x
    x = 160,307,316.06/13,915.36
  6. Step 6: Final answer
    x = 11,520.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.