Home / 12,220.10-18,272.55-9,109.70

Finding the Fourth Proportional to 12,220.10, 18,272.55 and 9,109.70

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Solution

The fourth proportional to 12,220.10, 18,272.55 and 9,109.70 is: 13,621.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.10 : 18,272.55 = 9,109.70 : x
  2. Step 2: Convert to fraction form
    12,220.10/18,272.55 = 9,109.70/x
  3. Step 3: Cross multiply
    12,220.10x = 18,272.55 × 9,109.70
  4. Step 4: Simplify right side
    12,220.10x = 166,457,448.74
  5. Step 5: Solve for x
    x = 166,457,448.74/12,220.10
  6. Step 6: Final answer
    x = 13,621.61

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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.