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Finding the Fourth Proportional to 20,956.60, 31,430.04 and 9,263.44

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Solution

The fourth proportional to 20,956.60, 31,430.04 and 9,263.44 is: 13,893.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.60 : 31,430.04 = 9,263.44 : x
  2. Step 2: Convert to fraction form
    20,956.60/31,430.04 = 9,263.44/x
  3. Step 3: Cross multiply
    20,956.60x = 31,430.04 × 9,263.44
  4. Step 4: Simplify right side
    20,956.60x = 291,150,289.74
  5. Step 5: Solve for x
    x = 291,150,289.74/20,956.60
  6. Step 6: Final answer
    x = 13,893.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.