Home / 12,220.72-18,320.96-10,656.88

Finding the Fourth Proportional to 12,220.72, 18,320.96 and 10,656.88

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Solution

The fourth proportional to 12,220.72, 18,320.96 and 10,656.88 is: 15,976.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.72 : 18,320.96 = 10,656.88 : x
  2. Step 2: Convert to fraction form
    12,220.72/18,320.96 = 10,656.88/x
  3. Step 3: Cross multiply
    12,220.72x = 18,320.96 × 10,656.88
  4. Step 4: Simplify right side
    12,220.72x = 195,244,272.20
  5. Step 5: Solve for x
    x = 195,244,272.20/12,220.72
  6. Step 6: Final answer
    x = 15,976.50

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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.