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Finding the Fourth Proportional to 19,136.67, 28,688.00 and 7,447.16

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Solution

The fourth proportional to 19,136.67, 28,688.00 and 7,447.16 is: 11,164.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,136.67 : 28,688.00 = 7,447.16 : x
  2. Step 2: Convert to fraction form
    19,136.67/28,688.00 = 7,447.16/x
  3. Step 3: Cross multiply
    19,136.67x = 28,688.00 × 7,447.16
  4. Step 4: Simplify right side
    19,136.67x = 213,643,945.40
  5. Step 5: Solve for x
    x = 213,643,945.40/19,136.67
  6. Step 6: Final answer
    x = 11,164.11

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Why These Related Problems?

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