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Finding the Fourth Proportional to 20,602.68, 28,430.50 and 11,652.06

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Solution

The fourth proportional to 20,602.68, 28,430.50 and 11,652.06 is: 16,079.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.68 : 28,430.50 = 11,652.06 : x
  2. Step 2: Convert to fraction form
    20,602.68/28,430.50 = 11,652.06/x
  3. Step 3: Cross multiply
    20,602.68x = 28,430.50 × 11,652.06
  4. Step 4: Simplify right side
    20,602.68x = 331,273,891.83
  5. Step 5: Solve for x
    x = 331,273,891.83/20,602.68
  6. Step 6: Final answer
    x = 16,079.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.