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Finding the Fourth Proportional to 9,979.79, 13,771.86 and 5,503.49

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Solution

The fourth proportional to 9,979.79, 13,771.86 and 5,503.49 is: 7,594.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.79 : 13,771.86 = 5,503.49 : x
  2. Step 2: Convert to fraction form
    9,979.79/13,771.86 = 5,503.49/x
  3. Step 3: Cross multiply
    9,979.79x = 13,771.86 × 5,503.49
  4. Step 4: Simplify right side
    9,979.79x = 75,793,224.93
  5. Step 5: Solve for x
    x = 75,793,224.93/9,979.79
  6. Step 6: Final answer
    x = 7,594.67

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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.