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Finding the Fourth Proportional to 14,162.40, 21,243.96 and 7,918.92

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Solution

The fourth proportional to 14,162.40, 21,243.96 and 7,918.92 is: 11,878.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,162.40 : 21,243.96 = 7,918.92 : x
  2. Step 2: Convert to fraction form
    14,162.40/21,243.96 = 7,918.92/x
  3. Step 3: Cross multiply
    14,162.40x = 21,243.96 × 7,918.92
  4. Step 4: Simplify right side
    14,162.40x = 168,229,219.72
  5. Step 5: Solve for x
    x = 168,229,219.72/14,162.40
  6. Step 6: Final answer
    x = 11,878.58

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1.5x scale

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.