Home / 28,317.88-39,078.57-15,742.63

Finding the Fourth Proportional to 28,317.88, 39,078.57 and 15,742.63

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Solution

The fourth proportional to 28,317.88, 39,078.57 and 15,742.63 is: 21,724.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,317.88 : 39,078.57 = 15,742.63 : x
  2. Step 2: Convert to fraction form
    28,317.88/39,078.57 = 15,742.63/x
  3. Step 3: Cross multiply
    28,317.88x = 39,078.57 × 15,742.63
  4. Step 4: Simplify right side
    28,317.88x = 615,199,468.44
  5. Step 5: Solve for x
    x = 615,199,468.44/28,317.88
  6. Step 6: Final answer
    x = 21,724.77

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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.