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Finding the Fourth Proportional to 28,792.51, 43,170.30 and 12,148

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Solution

The fourth proportional to 28,792.51, 43,170.30 and 12,148 is: 18,214.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,792.51 : 43,170.30 = 12,148 : x
  2. Step 2: Convert to fraction form
    28,792.51/43,170.30 = 12,148/x
  3. Step 3: Cross multiply
    28,792.51x = 43,170.30 × 12,148
  4. Step 4: Simplify right side
    28,792.51x = 524,432,804.40
  5. Step 5: Solve for x
    x = 524,432,804.40/28,792.51
  6. Step 6: Final answer
    x = 18,214.21

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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.