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Finding the Fourth Proportional to 28,603.13, 42,907.66 and 7,826.63

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Solution

The fourth proportional to 28,603.13, 42,907.66 and 7,826.63 is: 11,740.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603.13 : 42,907.66 = 7,826.63 : x
  2. Step 2: Convert to fraction form
    28,603.13/42,907.66 = 7,826.63/x
  3. Step 3: Cross multiply
    28,603.13x = 42,907.66 × 7,826.63
  4. Step 4: Simplify right side
    28,603.13x = 335,822,144.88
  5. Step 5: Solve for x
    x = 335,822,144.88/28,603.13
  6. Step 6: Final answer
    x = 11,740.75

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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.