Home / 13,399.64-18,490.87-7,431.18

Finding the Fourth Proportional to 13,399.64, 18,490.87 and 7,431.18

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Solution

The fourth proportional to 13,399.64, 18,490.87 and 7,431.18 is: 10,254.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.64 : 18,490.87 = 7,431.18 : x
  2. Step 2: Convert to fraction form
    13,399.64/18,490.87 = 7,431.18/x
  3. Step 3: Cross multiply
    13,399.64x = 18,490.87 × 7,431.18
  4. Step 4: Simplify right side
    13,399.64x = 137,408,983.33
  5. Step 5: Solve for x
    x = 137,408,983.33/13,399.64
  6. Step 6: Final answer
    x = 10,254.68

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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.