Home / 28,539.10-39,342.04-20,015.38

Finding the Fourth Proportional to 28,539.10, 39,342.04 and 20,015.38

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Solution

The fourth proportional to 28,539.10, 39,342.04 and 20,015.38 is: 27,591.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.10 : 39,342.04 = 20,015.38 : x
  2. Step 2: Convert to fraction form
    28,539.10/39,342.04 = 20,015.38/x
  3. Step 3: Cross multiply
    28,539.10x = 39,342.04 × 20,015.38
  4. Step 4: Simplify right side
    28,539.10x = 787,445,880.58
  5. Step 5: Solve for x
    x = 787,445,880.58/28,539.10
  6. Step 6: Final answer
    x = 27,591.83

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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.