Home / 7,721.48-11,582.26-1,878.12

Finding the Fourth Proportional to 7,721.48, 11,582.26 and 1,878.12

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Solution

The fourth proportional to 7,721.48, 11,582.26 and 1,878.12 is: 2,817.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.48 : 11,582.26 = 1,878.12 : x
  2. Step 2: Convert to fraction form
    7,721.48/11,582.26 = 1,878.12/x
  3. Step 3: Cross multiply
    7,721.48x = 11,582.26 × 1,878.12
  4. Step 4: Simplify right side
    7,721.48x = 21,752,874.15
  5. Step 5: Solve for x
    x = 21,752,874.15/7,721.48
  6. Step 6: Final answer
    x = 2,817.19

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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.