Home / 13,408.10-18,504.10-7,440.30

Finding the Fourth Proportional to 13,408.10, 18,504.10 and 7,440.30

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Solution

The fourth proportional to 13,408.10, 18,504.10 and 7,440.30 is: 10,268.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.10 : 18,504.10 = 7,440.30 : x
  2. Step 2: Convert to fraction form
    13,408.10/18,504.10 = 7,440.30/x
  3. Step 3: Cross multiply
    13,408.10x = 18,504.10 × 7,440.30
  4. Step 4: Simplify right side
    13,408.10x = 137,676,055.23
  5. Step 5: Solve for x
    x = 137,676,055.23/13,408.10
  6. Step 6: Final answer
    x = 10,268.13

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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.