Home / 11,720.90-16,173.81-6,616.15

Finding the Fourth Proportional to 11,720.90, 16,173.81 and 6,616.15

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Solution

The fourth proportional to 11,720.90, 16,173.81 and 6,616.15 is: 9,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.90 : 16,173.81 = 6,616.15 : x
  2. Step 2: Convert to fraction form
    11,720.90/16,173.81 = 6,616.15/x
  3. Step 3: Cross multiply
    11,720.90x = 16,173.81 × 6,616.15
  4. Step 4: Simplify right side
    11,720.90x = 107,008,312.60
  5. Step 5: Solve for x
    x = 107,008,312.60/11,720.90
  6. Step 6: Final answer
    x = 9,129.70

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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.