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Finding the Fourth Proportional to 8,667.28, 12,980.08 and 4,958.28

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Solution

The fourth proportional to 8,667.28, 12,980.08 and 4,958.28 is: 7,425.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.28 : 12,980.08 = 4,958.28 : x
  2. Step 2: Convert to fraction form
    8,667.28/12,980.08 = 4,958.28/x
  3. Step 3: Cross multiply
    8,667.28x = 12,980.08 × 4,958.28
  4. Step 4: Simplify right side
    8,667.28x = 64,358,871.06
  5. Step 5: Solve for x
    x = 64,358,871.06/8,667.28
  6. Step 6: Final answer
    x = 7,425.50

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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.