Home / 20,561.36-30,850.16-8,717.68

Finding the Fourth Proportional to 20,561.36, 30,850.16 and 8,717.68

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Solution

The fourth proportional to 20,561.36, 30,850.16 and 8,717.68 is: 13,079.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.36 : 30,850.16 = 8,717.68 : x
  2. Step 2: Convert to fraction form
    20,561.36/30,850.16 = 8,717.68/x
  3. Step 3: Cross multiply
    20,561.36x = 30,850.16 × 8,717.68
  4. Step 4: Simplify right side
    20,561.36x = 268,941,822.83
  5. Step 5: Solve for x
    x = 268,941,822.83/20,561.36
  6. Step 6: Final answer
    x = 13,079.96

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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.