Home / 12,515.15-18,777.96-5,491.54

Finding the Fourth Proportional to 12,515.15, 18,777.96 and 5,491.54

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Solution

The fourth proportional to 12,515.15, 18,777.96 and 5,491.54 is: 8,239.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.15 : 18,777.96 = 5,491.54 : x
  2. Step 2: Convert to fraction form
    12,515.15/18,777.96 = 5,491.54/x
  3. Step 3: Cross multiply
    12,515.15x = 18,777.96 × 5,491.54
  4. Step 4: Simplify right side
    12,515.15x = 103,119,871.51
  5. Step 5: Solve for x
    x = 103,119,871.51/12,515.15
  6. Step 6: Final answer
    x = 8,239.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.