Home / 7,721.90-11,582.85-1,878.49

Finding the Fourth Proportional to 7,721.90, 11,582.85 and 1,878.49

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Solution

The fourth proportional to 7,721.90, 11,582.85 and 1,878.49 is: 2,817.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.90 : 11,582.85 = 1,878.49 : x
  2. Step 2: Convert to fraction form
    7,721.90/11,582.85 = 1,878.49/x
  3. Step 3: Cross multiply
    7,721.90x = 11,582.85 × 1,878.49
  4. Step 4: Simplify right side
    7,721.90x = 21,758,278.85
  5. Step 5: Solve for x
    x = 21,758,278.85/7,721.90
  6. Step 6: Final answer
    x = 2,817.74

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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.