Home / 9,156.21-12,635.51-5,178.11

Finding the Fourth Proportional to 9,156.21, 12,635.51 and 5,178.11

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Solution

The fourth proportional to 9,156.21, 12,635.51 and 5,178.11 is: 7,145.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,156.21 : 12,635.51 = 5,178.11 : x
  2. Step 2: Convert to fraction form
    9,156.21/12,635.51 = 5,178.11/x
  3. Step 3: Cross multiply
    9,156.21x = 12,635.51 × 5,178.11
  4. Step 4: Simplify right side
    9,156.21x = 65,427,971.62
  5. Step 5: Solve for x
    x = 65,427,971.62/9,156.21
  6. Step 6: Final answer
    x = 7,145.75

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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.