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Finding the Fourth Proportional to 19,361.70, 29,042.55 and 6,215.40

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Solution

The fourth proportional to 19,361.70, 29,042.55 and 6,215.40 is: 9,323.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.70 : 29,042.55 = 6,215.40 : x
  2. Step 2: Convert to fraction form
    19,361.70/29,042.55 = 6,215.40/x
  3. Step 3: Cross multiply
    19,361.70x = 29,042.55 × 6,215.40
  4. Step 4: Simplify right side
    19,361.70x = 180,511,065.27
  5. Step 5: Solve for x
    x = 180,511,065.27/19,361.70
  6. Step 6: Final answer
    x = 9,323.10

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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.