Home / 7,138.08-9,821.28-6,972.36

Finding the Fourth Proportional to 7,138.08, 9,821.28 and 6,972.36

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Solution

The fourth proportional to 7,138.08, 9,821.28 and 6,972.36 is: 9,593.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.08 : 9,821.28 = 6,972.36 : x
  2. Step 2: Convert to fraction form
    7,138.08/9,821.28 = 6,972.36/x
  3. Step 3: Cross multiply
    7,138.08x = 9,821.28 × 6,972.36
  4. Step 4: Simplify right side
    7,138.08x = 68,477,499.82
  5. Step 5: Solve for x
    x = 68,477,499.82/7,138.08
  6. Step 6: Final answer
    x = 9,593.27

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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.