Home / 20,799.36-28,703.16-12,839.76

Finding the Fourth Proportional to 20,799.36, 28,703.16 and 12,839.76

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Solution

The fourth proportional to 20,799.36, 28,703.16 and 12,839.76 is: 17,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.36 : 28,703.16 = 12,839.76 : x
  2. Step 2: Convert to fraction form
    20,799.36/28,703.16 = 12,839.76/x
  3. Step 3: Cross multiply
    20,799.36x = 28,703.16 × 12,839.76
  4. Step 4: Simplify right side
    20,799.36x = 368,541,685.64
  5. Step 5: Solve for x
    x = 368,541,685.64/20,799.36
  6. Step 6: Final answer
    x = 17,718.90

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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.