Home / 12,828.85-19,228.68-5,428.69

Finding the Fourth Proportional to 12,828.85, 19,228.68 and 5,428.69

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Solution

The fourth proportional to 12,828.85, 19,228.68 and 5,428.69 is: 8,136.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.85 : 19,228.68 = 5,428.69 : x
  2. Step 2: Convert to fraction form
    12,828.85/19,228.68 = 5,428.69/x
  3. Step 3: Cross multiply
    12,828.85x = 19,228.68 × 5,428.69
  4. Step 4: Simplify right side
    12,828.85x = 104,386,446.69
  5. Step 5: Solve for x
    x = 104,386,446.69/12,828.85
  6. Step 6: Final answer
    x = 8,136.85

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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.