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Finding the Fourth Proportional to 8,980.79, 13,464.92 and 3,980.45

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Solution

The fourth proportional to 8,980.79, 13,464.92 and 3,980.45 is: 5,967.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.79 : 13,464.92 = 3,980.45 : x
  2. Step 2: Convert to fraction form
    8,980.79/13,464.92 = 3,980.45/x
  3. Step 3: Cross multiply
    8,980.79x = 13,464.92 × 3,980.45
  4. Step 4: Simplify right side
    8,980.79x = 53,596,353.59
  5. Step 5: Solve for x
    x = 53,596,353.59/8,980.79
  6. Step 6: Final answer
    x = 5,967.89

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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.