Home / 12,210.72-18,299.28-6,649.44

Finding the Fourth Proportional to 12,210.72, 18,299.28 and 6,649.44

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Solution

The fourth proportional to 12,210.72, 18,299.28 and 6,649.44 is: 9,965.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.72 : 18,299.28 = 6,649.44 : x
  2. Step 2: Convert to fraction form
    12,210.72/18,299.28 = 6,649.44/x
  3. Step 3: Cross multiply
    12,210.72x = 18,299.28 × 6,649.44
  4. Step 4: Simplify right side
    12,210.72x = 121,679,964.40
  5. Step 5: Solve for x
    x = 121,679,964.40/12,210.72
  6. Step 6: Final answer
    x = 9,965.01

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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.