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Finding the Fourth Proportional to 8,323.80, 12,485.70 and 7,837.80

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Solution

The fourth proportional to 8,323.80, 12,485.70 and 7,837.80 is: 11,756.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,323.80 : 12,485.70 = 7,837.80 : x
  2. Step 2: Convert to fraction form
    8,323.80/12,485.70 = 7,837.80/x
  3. Step 3: Cross multiply
    8,323.80x = 12,485.70 × 7,837.80
  4. Step 4: Simplify right side
    8,323.80x = 97,860,419.46
  5. Step 5: Solve for x
    x = 97,860,419.46/8,323.80
  6. Step 6: Final answer
    x = 11,756.70

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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.