Home / 13,607.32-18,778.11-7,638.43

Finding the Fourth Proportional to 13,607.32, 18,778.11 and 7,638.43

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Solution

The fourth proportional to 13,607.32, 18,778.11 and 7,638.43 is: 10,541.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.32 : 18,778.11 = 7,638.43 : x
  2. Step 2: Convert to fraction form
    13,607.32/18,778.11 = 7,638.43/x
  3. Step 3: Cross multiply
    13,607.32x = 18,778.11 × 7,638.43
  4. Step 4: Simplify right side
    13,607.32x = 143,435,146.68
  5. Step 5: Solve for x
    x = 143,435,146.68/13,607.32
  6. Step 6: Final answer
    x = 10,541.03

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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.