Home / 21,346.74-29,458.92-12,390.99

Finding the Fourth Proportional to 21,346.74, 29,458.92 and 12,390.99

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Solution

The fourth proportional to 21,346.74, 29,458.92 and 12,390.99 is: 17,099.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,346.74 : 29,458.92 = 12,390.99 : x
  2. Step 2: Convert to fraction form
    21,346.74/29,458.92 = 12,390.99/x
  3. Step 3: Cross multiply
    21,346.74x = 29,458.92 × 12,390.99
  4. Step 4: Simplify right side
    21,346.74x = 365,025,183.13
  5. Step 5: Solve for x
    x = 365,025,183.13/21,346.74
  6. Step 6: Final answer
    x = 17,099.81

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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.