Home / 28,317.09-39,076.50-15,742.65

Finding the Fourth Proportional to 28,317.09, 39,076.50 and 15,742.65

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Solution

The fourth proportional to 28,317.09, 39,076.50 and 15,742.65 is: 21,724.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,317.09 : 39,076.50 = 15,742.65 : x
  2. Step 2: Convert to fraction form
    28,317.09/39,076.50 = 15,742.65/x
  3. Step 3: Cross multiply
    28,317.09x = 39,076.50 × 15,742.65
  4. Step 4: Simplify right side
    28,317.09x = 615,167,662.73
  5. Step 5: Solve for x
    x = 615,167,662.73/28,317.09
  6. Step 6: Final answer
    x = 21,724.25

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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.