Home / 28,636.78-39,500.58-20,690.68

Finding the Fourth Proportional to 28,636.78, 39,500.58 and 20,690.68

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Solution

The fourth proportional to 28,636.78, 39,500.58 and 20,690.68 is: 28,540.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,636.78 : 39,500.58 = 20,690.68 : x
  2. Step 2: Convert to fraction form
    28,636.78/39,500.58 = 20,690.68/x
  3. Step 3: Cross multiply
    28,636.78x = 39,500.58 × 20,690.68
  4. Step 4: Simplify right side
    28,636.78x = 817,293,860.59
  5. Step 5: Solve for x
    x = 817,293,860.59/28,636.78
  6. Step 6: Final answer
    x = 28,540.01

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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.