Home / 28,765.91-39,687.44-16,820.80

Finding the Fourth Proportional to 28,765.91, 39,687.44 and 16,820.80

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Solution

The fourth proportional to 28,765.91, 39,687.44 and 16,820.80 is: 23,207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.91 : 39,687.44 = 16,820.80 : x
  2. Step 2: Convert to fraction form
    28,765.91/39,687.44 = 16,820.80/x
  3. Step 3: Cross multiply
    28,765.91x = 39,687.44 × 16,820.80
  4. Step 4: Simplify right side
    28,765.91x = 667,574,307.43
  5. Step 5: Solve for x
    x = 667,574,307.43/28,765.91
  6. Step 6: Final answer
    x = 23,207.13

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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.