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Finding the Fourth Proportional to 8,270.88, 12,390.68 and 6,412.90

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Solution

The fourth proportional to 8,270.88, 12,390.68 and 6,412.90 is: 9,607.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,270.88 : 12,390.68 = 6,412.90 : x
  2. Step 2: Convert to fraction form
    8,270.88/12,390.68 = 6,412.90/x
  3. Step 3: Cross multiply
    8,270.88x = 12,390.68 × 6,412.90
  4. Step 4: Simplify right side
    8,270.88x = 79,460,191.77
  5. Step 5: Solve for x
    x = 79,460,191.77/8,270.88
  6. Step 6: Final answer
    x = 9,607.22

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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.