Home / 14,076.20-21,138.60-7,515.20

Finding the Fourth Proportional to 14,076.20, 21,138.60 and 7,515.20

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Solution

The fourth proportional to 14,076.20, 21,138.60 and 7,515.20 is: 11,285.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,076.20 : 21,138.60 = 7,515.20 : x
  2. Step 2: Convert to fraction form
    14,076.20/21,138.60 = 7,515.20/x
  3. Step 3: Cross multiply
    14,076.20x = 21,138.60 × 7,515.20
  4. Step 4: Simplify right side
    14,076.20x = 158,860,806.72
  5. Step 5: Solve for x
    x = 158,860,806.72/14,076.20
  6. Step 6: Final answer
    x = 11,285.77

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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.