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Finding the Fourth Proportional to 9,988.92, 13,784.60 and 5,512.70

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Solution

The fourth proportional to 9,988.92, 13,784.60 and 5,512.70 is: 7,607.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.92 : 13,784.60 = 5,512.70 : x
  2. Step 2: Convert to fraction form
    9,988.92/13,784.60 = 5,512.70/x
  3. Step 3: Cross multiply
    9,988.92x = 13,784.60 × 5,512.70
  4. Step 4: Simplify right side
    9,988.92x = 75,990,267.93
  5. Step 5: Solve for x
    x = 75,990,267.93/9,988.92
  6. Step 6: Final answer
    x = 7,607.46

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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.