Home / 20,280.52-27,989.94-11,899.72

Finding the Fourth Proportional to 20,280.52, 27,989.94 and 11,899.72

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Solution

The fourth proportional to 20,280.52, 27,989.94 and 11,899.72 is: 16,423.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.52 : 27,989.94 = 11,899.72 : x
  2. Step 2: Convert to fraction form
    20,280.52/27,989.94 = 11,899.72/x
  3. Step 3: Cross multiply
    20,280.52x = 27,989.94 × 11,899.72
  4. Step 4: Simplify right side
    20,280.52x = 333,072,448.82
  5. Step 5: Solve for x
    x = 333,072,448.82/20,280.52
  6. Step 6: Final answer
    x = 16,423.27

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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.