Home / 12,828.84-19,246.80-5,429.40

Finding the Fourth Proportional to 12,828.84, 19,246.80 and 5,429.40

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Solution

The fourth proportional to 12,828.84, 19,246.80 and 5,429.40 is: 8,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,828.84 : 19,246.80 = 5,429.40 : x
  2. Step 2: Convert to fraction form
    12,828.84/19,246.80 = 5,429.40/x
  3. Step 3: Cross multiply
    12,828.84x = 19,246.80 × 5,429.40
  4. Step 4: Simplify right side
    12,828.84x = 104,498,575.92
  5. Step 5: Solve for x
    x = 104,498,575.92/12,828.84
  6. Step 6: Final answer
    x = 8,145.60

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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.