Home / 20,839.58-28,728.97-12,877.28

Finding the Fourth Proportional to 20,839.58, 28,728.97 and 12,877.28

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Solution

The fourth proportional to 20,839.58, 28,728.97 and 12,877.28 is: 17,752.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.58 : 28,728.97 = 12,877.28 : x
  2. Step 2: Convert to fraction form
    20,839.58/28,728.97 = 12,877.28/x
  3. Step 3: Cross multiply
    20,839.58x = 28,728.97 × 12,877.28
  4. Step 4: Simplify right side
    20,839.58x = 369,950,814.96
  5. Step 5: Solve for x
    x = 369,950,814.96/20,839.58
  6. Step 6: Final answer
    x = 17,752.32

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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.