Home / 12,144.20-18,216.48-11,547.60

Finding the Fourth Proportional to 12,144.20, 18,216.48 and 11,547.60

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Solution

The fourth proportional to 12,144.20, 18,216.48 and 11,547.60 is: 17,321.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,144.20 : 18,216.48 = 11,547.60 : x
  2. Step 2: Convert to fraction form
    12,144.20/18,216.48 = 11,547.60/x
  3. Step 3: Cross multiply
    12,144.20x = 18,216.48 × 11,547.60
  4. Step 4: Simplify right side
    12,144.20x = 210,356,624.45
  5. Step 5: Solve for x
    x = 210,356,624.45/12,144.20
  6. Step 6: Final answer
    x = 17,321.57

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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.