Home / 13,607.28-18,777.48-7,639.44

Finding the Fourth Proportional to 13,607.28, 18,777.48 and 7,639.44

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Solution

The fourth proportional to 13,607.28, 18,777.48 and 7,639.44 is: 10,542.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.28 : 18,777.48 = 7,639.44 : x
  2. Step 2: Convert to fraction form
    13,607.28/18,777.48 = 7,639.44/x
  3. Step 3: Cross multiply
    13,607.28x = 18,777.48 × 7,639.44
  4. Step 4: Simplify right side
    13,607.28x = 143,449,431.81
  5. Step 5: Solve for x
    x = 143,449,431.81/13,607.28
  6. Step 6: Final answer
    x = 10,542.11

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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.