Home / 8,688.64-13,000.44-5,165.80

Finding the Fourth Proportional to 8,688.64, 13,000.44 and 5,165.80

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Solution

The fourth proportional to 8,688.64, 13,000.44 and 5,165.80 is: 7,729.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.64 : 13,000.44 = 5,165.80 : x
  2. Step 2: Convert to fraction form
    8,688.64/13,000.44 = 5,165.80/x
  3. Step 3: Cross multiply
    8,688.64x = 13,000.44 × 5,165.80
  4. Step 4: Simplify right side
    8,688.64x = 67,157,672.95
  5. Step 5: Solve for x
    x = 67,157,672.95/8,688.64
  6. Step 6: Final answer
    x = 7,729.37

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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.