Home / 20,280.08-27,989.16-11,897.36

Finding the Fourth Proportional to 20,280.08, 27,989.16 and 11,897.36

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Solution

The fourth proportional to 20,280.08, 27,989.16 and 11,897.36 is: 16,419.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.08 : 27,989.16 = 11,897.36 : x
  2. Step 2: Convert to fraction form
    20,280.08/27,989.16 = 11,897.36/x
  3. Step 3: Cross multiply
    20,280.08x = 27,989.16 × 11,897.36
  4. Step 4: Simplify right side
    20,280.08x = 332,997,112.62
  5. Step 5: Solve for x
    x = 332,997,112.62/20,280.08
  6. Step 6: Final answer
    x = 16,419.91

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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.