Home / 9,387.21-12,954.24-5,138.35

Finding the Fourth Proportional to 9,387.21, 12,954.24 and 5,138.35

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Solution

The fourth proportional to 9,387.21, 12,954.24 and 5,138.35 is: 7,090.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387.21 : 12,954.24 = 5,138.35 : x
  2. Step 2: Convert to fraction form
    9,387.21/12,954.24 = 5,138.35/x
  3. Step 3: Cross multiply
    9,387.21x = 12,954.24 × 5,138.35
  4. Step 4: Simplify right side
    9,387.21x = 66,563,419.10
  5. Step 5: Solve for x
    x = 66,563,419.10/9,387.21
  6. Step 6: Final answer
    x = 7,090.86

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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.