Home / 20,659.87-28,510.82-12,274.75

Finding the Fourth Proportional to 20,659.87, 28,510.82 and 12,274.75

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Solution

The fourth proportional to 20,659.87, 28,510.82 and 12,274.75 is: 16,939.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.87 : 28,510.82 = 12,274.75 : x
  2. Step 2: Convert to fraction form
    20,659.87/28,510.82 = 12,274.75/x
  3. Step 3: Cross multiply
    20,659.87x = 28,510.82 × 12,274.75
  4. Step 4: Simplify right side
    20,659.87x = 349,963,187.80
  5. Step 5: Solve for x
    x = 349,963,187.80/20,659.87
  6. Step 6: Final answer
    x = 16,939.27

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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.