Home / 21,742.47-30,005.10-12,183.07

Finding the Fourth Proportional to 21,742.47, 30,005.10 and 12,183.07

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Solution

The fourth proportional to 21,742.47, 30,005.10 and 12,183.07 is: 16,812.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,742.47 : 30,005.10 = 12,183.07 : x
  2. Step 2: Convert to fraction form
    21,742.47/30,005.10 = 12,183.07/x
  3. Step 3: Cross multiply
    21,742.47x = 30,005.10 × 12,183.07
  4. Step 4: Simplify right side
    21,742.47x = 365,554,233.66
  5. Step 5: Solve for x
    x = 365,554,233.66/21,742.47
  6. Step 6: Final answer
    x = 16,812.91

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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.