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Finding the Fourth Proportional to 9,409.48, 12,984.98 and 5,217.72

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Solution

The fourth proportional to 9,409.48, 12,984.98 and 5,217.72 is: 7,200.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,409.48 : 12,984.98 = 5,217.72 : x
  2. Step 2: Convert to fraction form
    9,409.48/12,984.98 = 5,217.72/x
  3. Step 3: Cross multiply
    9,409.48x = 12,984.98 × 5,217.72
  4. Step 4: Simplify right side
    9,409.48x = 67,751,989.85
  5. Step 5: Solve for x
    x = 67,751,989.85/9,409.48
  6. Step 6: Final answer
    x = 7,200.40

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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.