Home / 13,050.21-19,558.07-7,129.72

Finding the Fourth Proportional to 13,050.21, 19,558.07 and 7,129.72

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Solution

The fourth proportional to 13,050.21, 19,558.07 and 7,129.72 is: 10,685.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,050.21 : 19,558.07 = 7,129.72 : x
  2. Step 2: Convert to fraction form
    13,050.21/19,558.07 = 7,129.72/x
  3. Step 3: Cross multiply
    13,050.21x = 19,558.07 × 7,129.72
  4. Step 4: Simplify right side
    13,050.21x = 139,443,562.84
  5. Step 5: Solve for x
    x = 139,443,562.84/13,050.21
  6. Step 6: Final answer
    x = 10,685.16

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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.