Home / 8,667.81-12,999.44-3,120.12

Finding the Fourth Proportional to 8,667.81, 12,999.44 and 3,120.12

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Solution

The fourth proportional to 8,667.81, 12,999.44 and 3,120.12 is: 4,679.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.81 : 12,999.44 = 3,120.12 : x
  2. Step 2: Convert to fraction form
    8,667.81/12,999.44 = 3,120.12/x
  3. Step 3: Cross multiply
    8,667.81x = 12,999.44 × 3,120.12
  4. Step 4: Simplify right side
    8,667.81x = 40,559,802.98
  5. Step 5: Solve for x
    x = 40,559,802.98/8,667.81
  6. Step 6: Final answer
    x = 4,679.36

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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.