Home / 20,996.88-28,977.32-12,047.28

Finding the Fourth Proportional to 20,996.88, 28,977.32 and 12,047.28

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Solution

The fourth proportional to 20,996.88, 28,977.32 and 12,047.28 is: 16,626.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.88 : 28,977.32 = 12,047.28 : x
  2. Step 2: Convert to fraction form
    20,996.88/28,977.32 = 12,047.28/x
  3. Step 3: Cross multiply
    20,996.88x = 28,977.32 × 12,047.28
  4. Step 4: Simplify right side
    20,996.88x = 349,097,887.69
  5. Step 5: Solve for x
    x = 349,097,887.69/20,996.88
  6. Step 6: Final answer
    x = 16,626.18

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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.