Home / 15,494.36-21,382.25-8,420.81

Finding the Fourth Proportional to 15,494.36, 21,382.25 and 8,420.81

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Solution

The fourth proportional to 15,494.36, 21,382.25 and 8,420.81 is: 11,620.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.36 : 21,382.25 = 8,420.81 : x
  2. Step 2: Convert to fraction form
    15,494.36/21,382.25 = 8,420.81/x
  3. Step 3: Cross multiply
    15,494.36x = 21,382.25 × 8,420.81
  4. Step 4: Simplify right side
    15,494.36x = 180,055,778.76
  5. Step 5: Solve for x
    x = 180,055,778.76/15,494.36
  6. Step 6: Final answer
    x = 11,620.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.