Home / 8,715.20-13,072.80-6,667.20

Finding the Fourth Proportional to 8,715.20, 13,072.80 and 6,667.20

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Solution

The fourth proportional to 8,715.20, 13,072.80 and 6,667.20 is: 10,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.20 : 13,072.80 = 6,667.20 : x
  2. Step 2: Convert to fraction form
    8,715.20/13,072.80 = 6,667.20/x
  3. Step 3: Cross multiply
    8,715.20x = 13,072.80 × 6,667.20
  4. Step 4: Simplify right side
    8,715.20x = 87,158,972.16
  5. Step 5: Solve for x
    x = 87,158,972.16/8,715.20
  6. Step 6: Final answer
    x = 10,000.80

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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.