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Finding the Fourth Proportional to 21,402.68, 32,110.50 and 8,928.68

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Solution

The fourth proportional to 21,402.68, 32,110.50 and 8,928.68 is: 13,395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.68 : 32,110.50 = 8,928.68 : x
  2. Step 2: Convert to fraction form
    21,402.68/32,110.50 = 8,928.68/x
  3. Step 3: Cross multiply
    21,402.68x = 32,110.50 × 8,928.68
  4. Step 4: Simplify right side
    21,402.68x = 286,704,379.14
  5. Step 5: Solve for x
    x = 286,704,379.14/21,402.68
  6. Step 6: Final answer
    x = 13,395.72

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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.