Home / 15,742.89-21,724.90-9,028.12

Finding the Fourth Proportional to 15,742.89, 21,724.90 and 9,028.12

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Solution

The fourth proportional to 15,742.89, 21,724.90 and 9,028.12 is: 12,458.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.89 : 21,724.90 = 9,028.12 : x
  2. Step 2: Convert to fraction form
    15,742.89/21,724.90 = 9,028.12/x
  3. Step 3: Cross multiply
    15,742.89x = 21,724.90 × 9,028.12
  4. Step 4: Simplify right side
    15,742.89x = 196,135,004.19
  5. Step 5: Solve for x
    x = 196,135,004.19/15,742.89
  6. Step 6: Final answer
    x = 12,458.64

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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.