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Finding the Fourth Proportional to 19,215.30, 28,828.35 and 8,127.30

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Solution

The fourth proportional to 19,215.30, 28,828.35 and 8,127.30 is: 12,193.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.30 : 28,828.35 = 8,127.30 : x
  2. Step 2: Convert to fraction form
    19,215.30/28,828.35 = 8,127.30/x
  3. Step 3: Cross multiply
    19,215.30x = 28,828.35 × 8,127.30
  4. Step 4: Simplify right side
    19,215.30x = 234,296,648.96
  5. Step 5: Solve for x
    x = 234,296,648.96/19,215.30
  6. Step 6: Final answer
    x = 12,193.23

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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.