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Finding the Fourth Proportional to 8,600.24, 12,903.60 and 3,980

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Solution

The fourth proportional to 8,600.24, 12,903.60 and 3,980 is: 5,971.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,600.24 : 12,903.60 = 3,980 : x
  2. Step 2: Convert to fraction form
    8,600.24/12,903.60 = 3,980/x
  3. Step 3: Cross multiply
    8,600.24x = 12,903.60 × 3,980
  4. Step 4: Simplify right side
    8,600.24x = 51,356,328
  5. Step 5: Solve for x
    x = 51,356,328/8,600.24
  6. Step 6: Final answer
    x = 5,971.50

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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.