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Finding the Fourth Proportional to 14,699.72, 20,285.64 and 7,985.29

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Solution

The fourth proportional to 14,699.72, 20,285.64 and 7,985.29 is: 11,019.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,699.72 : 20,285.64 = 7,985.29 : x
  2. Step 2: Convert to fraction form
    14,699.72/20,285.64 = 7,985.29/x
  3. Step 3: Cross multiply
    14,699.72x = 20,285.64 × 7,985.29
  4. Step 4: Simplify right side
    14,699.72x = 161,986,667.52
  5. Step 5: Solve for x
    x = 161,986,667.52/14,699.72
  6. Step 6: Final answer
    x = 11,019.71

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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.