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Finding the Fourth Proportional to 9,855.79, 13,601.03 and 5,379.64

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Solution

The fourth proportional to 9,855.79, 13,601.03 and 5,379.64 is: 7,423.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,855.79 : 13,601.03 = 5,379.64 : x
  2. Step 2: Convert to fraction form
    9,855.79/13,601.03 = 5,379.64/x
  3. Step 3: Cross multiply
    9,855.79x = 13,601.03 × 5,379.64
  4. Step 4: Simplify right side
    9,855.79x = 73,168,645.03
  5. Step 5: Solve for x
    x = 73,168,645.03/9,855.79
  6. Step 6: Final answer
    x = 7,423.92

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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.