Home / 7,117.92-9,822.78-3,974.28

Finding the Fourth Proportional to 7,117.92, 9,822.78 and 3,974.28

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Solution

The fourth proportional to 7,117.92, 9,822.78 and 3,974.28 is: 5,484.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,117.92 : 9,822.78 = 3,974.28 : x
  2. Step 2: Convert to fraction form
    7,117.92/9,822.78 = 3,974.28/x
  3. Step 3: Cross multiply
    7,117.92x = 9,822.78 × 3,974.28
  4. Step 4: Simplify right side
    7,117.92x = 39,038,478.10
  5. Step 5: Solve for x
    x = 39,038,478.10/7,117.92
  6. Step 6: Final answer
    x = 5,484.53

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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.