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Finding the Fourth Proportional to 7,321.92, 10,985.28 and 2,937.12

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Solution

The fourth proportional to 7,321.92, 10,985.28 and 2,937.12 is: 4,406.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.92 : 10,985.28 = 2,937.12 : x
  2. Step 2: Convert to fraction form
    7,321.92/10,985.28 = 2,937.12/x
  3. Step 3: Cross multiply
    7,321.92x = 10,985.28 × 2,937.12
  4. Step 4: Simplify right side
    7,321.92x = 32,265,085.59
  5. Step 5: Solve for x
    x = 32,265,085.59/7,321.92
  6. Step 6: Final answer
    x = 4,406.64

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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.