Home / 28,356.70-39,082.80-20,786.95

Finding the Fourth Proportional to 28,356.70, 39,082.80 and 20,786.95

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Solution

The fourth proportional to 28,356.70, 39,082.80 and 20,786.95 is: 28,649.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.70 : 39,082.80 = 20,786.95 : x
  2. Step 2: Convert to fraction form
    28,356.70/39,082.80 = 20,786.95/x
  3. Step 3: Cross multiply
    28,356.70x = 39,082.80 × 20,786.95
  4. Step 4: Simplify right side
    28,356.70x = 812,412,209.46
  5. Step 5: Solve for x
    x = 812,412,209.46/28,356.70
  6. Step 6: Final answer
    x = 28,649.74

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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.