Home / 28,317.75-39,078.54-15,742.50

Finding the Fourth Proportional to 28,317.75, 39,078.54 and 15,742.50

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Solution

The fourth proportional to 28,317.75, 39,078.54 and 15,742.50 is: 21,724.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,317.75 : 39,078.54 = 15,742.50 : x
  2. Step 2: Convert to fraction form
    28,317.75/39,078.54 = 15,742.50/x
  3. Step 3: Cross multiply
    28,317.75x = 39,078.54 × 15,742.50
  4. Step 4: Simplify right side
    28,317.75x = 615,193,915.95
  5. Step 5: Solve for x
    x = 615,193,915.95/28,317.75
  6. Step 6: Final answer
    x = 21,724.68

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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.