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Finding the Fourth Proportional to 13,583.40, 20,331.90 and 9,695.40

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Solution

The fourth proportional to 13,583.40, 20,331.90 and 9,695.40 is: 14,512.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,583.40 : 20,331.90 = 9,695.40 : x
  2. Step 2: Convert to fraction form
    13,583.40/20,331.90 = 9,695.40/x
  3. Step 3: Cross multiply
    13,583.40x = 20,331.90 × 9,695.40
  4. Step 4: Simplify right side
    13,583.40x = 197,125,903.26
  5. Step 5: Solve for x
    x = 197,125,903.26/13,583.40
  6. Step 6: Final answer
    x = 14,512.27

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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.