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Finding the Fourth Proportional to 18,904.30, 28,356.45 and 5,053.30

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Solution

The fourth proportional to 18,904.30, 28,356.45 and 5,053.30 is: 7,579.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.30 : 28,356.45 = 5,053.30 : x
  2. Step 2: Convert to fraction form
    18,904.30/28,356.45 = 5,053.30/x
  3. Step 3: Cross multiply
    18,904.30x = 28,356.45 × 5,053.30
  4. Step 4: Simplify right side
    18,904.30x = 143,293,648.79
  5. Step 5: Solve for x
    x = 143,293,648.79/18,904.30
  6. Step 6: Final answer
    x = 7,579.95

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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.