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Finding the Fourth Proportional to 28,643.74, 42,982.62 and 15,495.82

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Solution

The fourth proportional to 28,643.74, 42,982.62 and 15,495.82 is: 23,252.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,643.74 : 42,982.62 = 15,495.82 : x
  2. Step 2: Convert to fraction form
    28,643.74/42,982.62 = 15,495.82/x
  3. Step 3: Cross multiply
    28,643.74x = 42,982.62 × 15,495.82
  4. Step 4: Simplify right side
    28,643.74x = 666,050,942.65
  5. Step 5: Solve for x
    x = 666,050,942.65/28,643.74
  6. Step 6: Final answer
    x = 23,252.93

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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.