Home / 7,721.66-11,582.39-1,878.28

Finding the Fourth Proportional to 7,721.66, 11,582.39 and 1,878.28

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Solution

The fourth proportional to 7,721.66, 11,582.39 and 1,878.28 is: 2,817.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.66 : 11,582.39 = 1,878.28 : x
  2. Step 2: Convert to fraction form
    7,721.66/11,582.39 = 1,878.28/x
  3. Step 3: Cross multiply
    7,721.66x = 11,582.39 × 1,878.28
  4. Step 4: Simplify right side
    7,721.66x = 21,754,947.23
  5. Step 5: Solve for x
    x = 21,754,947.23/7,721.66
  6. Step 6: Final answer
    x = 2,817.39

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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.