Home / 28,687.73-39,567.15-20,756.21

Finding the Fourth Proportional to 28,687.73, 39,567.15 and 20,756.21

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Solution

The fourth proportional to 28,687.73, 39,567.15 and 20,756.21 is: 28,627.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.73 : 39,567.15 = 20,756.21 : x
  2. Step 2: Convert to fraction form
    28,687.73/39,567.15 = 20,756.21/x
  3. Step 3: Cross multiply
    28,687.73x = 39,567.15 × 20,756.21
  4. Step 4: Simplify right side
    28,687.73x = 821,264,074.50
  5. Step 5: Solve for x
    x = 821,264,074.50/28,687.73
  6. Step 6: Final answer
    x = 28,627.71

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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.