Home / 28,534.12-39,377.82-15,785.80

Finding the Fourth Proportional to 28,534.12, 39,377.82 and 15,785.80

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Solution

The fourth proportional to 28,534.12, 39,377.82 and 15,785.80 is: 21,784.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.12 : 39,377.82 = 15,785.80 : x
  2. Step 2: Convert to fraction form
    28,534.12/39,377.82 = 15,785.80/x
  3. Step 3: Cross multiply
    28,534.12x = 39,377.82 × 15,785.80
  4. Step 4: Simplify right side
    28,534.12x = 621,610,390.96
  5. Step 5: Solve for x
    x = 621,610,390.96/28,534.12
  6. Step 6: Final answer
    x = 21,784.81

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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.