Home / 13,607.41-18,777.72-7,639.42

Finding the Fourth Proportional to 13,607.41, 18,777.72 and 7,639.42

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Solution

The fourth proportional to 13,607.41, 18,777.72 and 7,639.42 is: 10,542.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.41 : 18,777.72 = 7,639.42 : x
  2. Step 2: Convert to fraction form
    13,607.41/18,777.72 = 7,639.42/x
  3. Step 3: Cross multiply
    13,607.41x = 18,777.72 × 7,639.42
  4. Step 4: Simplify right side
    13,607.41x = 143,450,889.72
  5. Step 5: Solve for x
    x = 143,450,889.72/13,607.41
  6. Step 6: Final answer
    x = 10,542.12

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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.