Home / 16,720.11-23,069.21-9,999.81

Finding the Fourth Proportional to 16,720.11, 23,069.21 and 9,999.81

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Solution

The fourth proportional to 16,720.11, 23,069.21 and 9,999.81 is: 13,797.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,720.11 : 23,069.21 = 9,999.81 : x
  2. Step 2: Convert to fraction form
    16,720.11/23,069.21 = 9,999.81/x
  3. Step 3: Cross multiply
    16,720.11x = 23,069.21 × 9,999.81
  4. Step 4: Simplify right side
    16,720.11x = 230,687,666.85
  5. Step 5: Solve for x
    x = 230,687,666.85/16,720.11
  6. Step 6: Final answer
    x = 13,797.02

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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.