Home / 28,318-39,078.89-15,742.75

Finding the Fourth Proportional to 28,318, 39,078.89 and 15,742.75

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Solution

The fourth proportional to 28,318, 39,078.89 and 15,742.75 is: 21,725.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318 : 39,078.89 = 15,742.75 : x
  2. Step 2: Convert to fraction form
    28,318/39,078.89 = 15,742.75/x
  3. Step 3: Cross multiply
    28,318x = 39,078.89 × 15,742.75
  4. Step 4: Simplify right side
    28,318x = 615,209,116.83
  5. Step 5: Solve for x
    x = 615,209,116.83/28,318
  6. Step 6: Final answer
    x = 21,725.02

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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.