Home / 8,667.09-12,999.20-3,119.40

Finding the Fourth Proportional to 8,667.09, 12,999.20 and 3,119.40

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Solution

The fourth proportional to 8,667.09, 12,999.20 and 3,119.40 is: 4,678.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.09 : 12,999.20 = 3,119.40 : x
  2. Step 2: Convert to fraction form
    8,667.09/12,999.20 = 3,119.40/x
  3. Step 3: Cross multiply
    8,667.09x = 12,999.20 × 3,119.40
  4. Step 4: Simplify right side
    8,667.09x = 40,549,688.88
  5. Step 5: Solve for x
    x = 40,549,688.88/8,667.09
  6. Step 6: Final answer
    x = 4,678.58

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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.