Home / 13,491.18-20,228.94-4,128.53

Finding the Fourth Proportional to 13,491.18, 20,228.94 and 4,128.53

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Solution

The fourth proportional to 13,491.18, 20,228.94 and 4,128.53 is: 6,190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.18 : 20,228.94 = 4,128.53 : x
  2. Step 2: Convert to fraction form
    13,491.18/20,228.94 = 4,128.53/x
  3. Step 3: Cross multiply
    13,491.18x = 20,228.94 × 4,128.53
  4. Step 4: Simplify right side
    13,491.18x = 83,515,684.51
  5. Step 5: Solve for x
    x = 83,515,684.51/13,491.18
  6. Step 6: Final answer
    x = 6,190.39

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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.