Home / 10,909.98-16,389.60-6,470.55

Finding the Fourth Proportional to 10,909.98, 16,389.60 and 6,470.55

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Solution

The fourth proportional to 10,909.98, 16,389.60 and 6,470.55 is: 9,720.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,909.98 : 16,389.60 = 6,470.55 : x
  2. Step 2: Convert to fraction form
    10,909.98/16,389.60 = 6,470.55/x
  3. Step 3: Cross multiply
    10,909.98x = 16,389.60 × 6,470.55
  4. Step 4: Simplify right side
    10,909.98x = 106,049,759.01
  5. Step 5: Solve for x
    x = 106,049,759.01/10,909.98
  6. Step 6: Final answer
    x = 9,720.44

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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.