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Finding the Fourth Proportional to 8,695.40, 13,023.90 and 8,503.40

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Solution

The fourth proportional to 8,695.40, 13,023.90 and 8,503.40 is: 12,736.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.40 : 13,023.90 = 8,503.40 : x
  2. Step 2: Convert to fraction form
    8,695.40/13,023.90 = 8,503.40/x
  3. Step 3: Cross multiply
    8,695.40x = 13,023.90 × 8,503.40
  4. Step 4: Simplify right side
    8,695.40x = 110,747,431.26
  5. Step 5: Solve for x
    x = 110,747,431.26/8,695.40
  6. Step 6: Final answer
    x = 12,736.32

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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.