Home / 28,812.90-43,225.17-12,172.98

Finding the Fourth Proportional to 28,812.90, 43,225.17 and 12,172.98

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Solution

The fourth proportional to 28,812.90, 43,225.17 and 12,172.98 is: 18,261.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812.90 : 43,225.17 = 12,172.98 : x
  2. Step 2: Convert to fraction form
    28,812.90/43,225.17 = 12,172.98/x
  3. Step 3: Cross multiply
    28,812.90x = 43,225.17 × 12,172.98
  4. Step 4: Simplify right side
    28,812.90x = 526,179,129.91
  5. Step 5: Solve for x
    x = 526,179,129.91/28,812.90
  6. Step 6: Final answer
    x = 18,261.93

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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.