Home / 7,921.52-10,921.78-5,083.90

Finding the Fourth Proportional to 7,921.52, 10,921.78 and 5,083.90

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Solution

The fourth proportional to 7,921.52, 10,921.78 and 5,083.90 is: 7,009.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.52 : 10,921.78 = 5,083.90 : x
  2. Step 2: Convert to fraction form
    7,921.52/10,921.78 = 5,083.90/x
  3. Step 3: Cross multiply
    7,921.52x = 10,921.78 × 5,083.90
  4. Step 4: Simplify right side
    7,921.52x = 55,525,237.34
  5. Step 5: Solve for x
    x = 55,525,237.34/7,921.52
  6. Step 6: Final answer
    x = 7,009.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.