Home / 11,420.18-15,759.91-6,384.61

Finding the Fourth Proportional to 11,420.18, 15,759.91 and 6,384.61

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Solution

The fourth proportional to 11,420.18, 15,759.91 and 6,384.61 is: 8,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.18 : 15,759.91 = 6,384.61 : x
  2. Step 2: Convert to fraction form
    11,420.18/15,759.91 = 6,384.61/x
  3. Step 3: Cross multiply
    11,420.18x = 15,759.91 × 6,384.61
  4. Step 4: Simplify right side
    11,420.18x = 100,620,847.06
  5. Step 5: Solve for x
    x = 100,620,847.06/11,420.18
  6. Step 6: Final answer
    x = 8,810.80

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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.