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Finding the Fourth Proportional to 28,428.93, 42,643.49 and 7,367.46

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Solution

The fourth proportional to 28,428.93, 42,643.49 and 7,367.46 is: 11,051.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.93 : 42,643.49 = 7,367.46 : x
  2. Step 2: Convert to fraction form
    28,428.93/42,643.49 = 7,367.46/x
  3. Step 3: Cross multiply
    28,428.93x = 42,643.49 × 7,367.46
  4. Step 4: Simplify right side
    28,428.93x = 314,174,170.00
  5. Step 5: Solve for x
    x = 314,174,170.00/28,428.93
  6. Step 6: Final answer
    x = 11,051.21

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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.