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Finding the Fourth Proportional to 19,168.79, 28,759.06 and 9,815.38

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Solution

The fourth proportional to 19,168.79, 28,759.06 and 9,815.38 is: 14,726.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,168.79 : 28,759.06 = 9,815.38 : x
  2. Step 2: Convert to fraction form
    19,168.79/28,759.06 = 9,815.38/x
  3. Step 3: Cross multiply
    19,168.79x = 28,759.06 × 9,815.38
  4. Step 4: Simplify right side
    19,168.79x = 282,281,056.52
  5. Step 5: Solve for x
    x = 282,281,056.52/19,168.79
  6. Step 6: Final answer
    x = 14,726.08

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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.