Home / 12,821.68-19,254.48-7,920.28

Finding the Fourth Proportional to 12,821.68, 19,254.48 and 7,920.28

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Solution

The fourth proportional to 12,821.68, 19,254.48 and 7,920.28 is: 11,893.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.68 : 19,254.48 = 7,920.28 : x
  2. Step 2: Convert to fraction form
    12,821.68/19,254.48 = 7,920.28/x
  3. Step 3: Cross multiply
    12,821.68x = 19,254.48 × 7,920.28
  4. Step 4: Simplify right side
    12,821.68x = 152,500,872.85
  5. Step 5: Solve for x
    x = 152,500,872.85/12,821.68
  6. Step 6: Final answer
    x = 11,893.99

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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.