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Finding the Fourth Proportional to 19,112, 28,675.30 and 7,426.14

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Solution

The fourth proportional to 19,112, 28,675.30 and 7,426.14 is: 11,142.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,112 : 28,675.30 = 7,426.14 : x
  2. Step 2: Convert to fraction form
    19,112/28,675.30 = 7,426.14/x
  3. Step 3: Cross multiply
    19,112x = 28,675.30 × 7,426.14
  4. Step 4: Simplify right side
    19,112x = 212,946,792.34
  5. Step 5: Solve for x
    x = 212,946,792.34/19,112
  6. Step 6: Final answer
    x = 11,142.05

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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.