Home / 9,415.28-12,992.58-5,165.54

Finding the Fourth Proportional to 9,415.28, 12,992.58 and 5,165.54

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Solution

The fourth proportional to 9,415.28, 12,992.58 and 5,165.54 is: 7,128.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.28 : 12,992.58 = 5,165.54 : x
  2. Step 2: Convert to fraction form
    9,415.28/12,992.58 = 5,165.54/x
  3. Step 3: Cross multiply
    9,415.28x = 12,992.58 × 5,165.54
  4. Step 4: Simplify right side
    9,415.28x = 67,113,691.69
  5. Step 5: Solve for x
    x = 67,113,691.69/9,415.28
  6. Step 6: Final answer
    x = 7,128.17

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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.