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Finding the Fourth Proportional to 19,294.30, 28,942.04 and 6,643.92

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Solution

The fourth proportional to 19,294.30, 28,942.04 and 6,643.92 is: 9,966.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,294.30 : 28,942.04 = 6,643.92 : x
  2. Step 2: Convert to fraction form
    19,294.30/28,942.04 = 6,643.92/x
  3. Step 3: Cross multiply
    19,294.30x = 28,942.04 × 6,643.92
  4. Step 4: Simplify right side
    19,294.30x = 192,288,598.40
  5. Step 5: Solve for x
    x = 192,288,598.40/19,294.30
  6. Step 6: Final answer
    x = 9,966.08

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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.