Home / 12,216.18-18,307.86-6,661.20

Finding the Fourth Proportional to 12,216.18, 18,307.86 and 6,661.20

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Solution

The fourth proportional to 12,216.18, 18,307.86 and 6,661.20 is: 9,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,216.18 : 18,307.86 = 6,661.20 : x
  2. Step 2: Convert to fraction form
    12,216.18/18,307.86 = 6,661.20/x
  3. Step 3: Cross multiply
    12,216.18x = 18,307.86 × 6,661.20
  4. Step 4: Simplify right side
    12,216.18x = 121,952,317.03
  5. Step 5: Solve for x
    x = 121,952,317.03/12,216.18
  6. Step 6: Final answer
    x = 9,982.85

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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.