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Finding the Fourth Proportional to 21,900.64, 32,859.48 and 8,756.77

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Solution

The fourth proportional to 21,900.64, 32,859.48 and 8,756.77 is: 13,138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.64 : 32,859.48 = 8,756.77 : x
  2. Step 2: Convert to fraction form
    21,900.64/32,859.48 = 8,756.77/x
  3. Step 3: Cross multiply
    21,900.64x = 32,859.48 × 8,756.77
  4. Step 4: Simplify right side
    21,900.64x = 287,742,779.31
  5. Step 5: Solve for x
    x = 287,742,779.31/21,900.64
  6. Step 6: Final answer
    x = 13,138.56

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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.