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Finding the Fourth Proportional to 19,008, 28,521.72 and 7,318.08

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Solution

The fourth proportional to 19,008, 28,521.72 and 7,318.08 is: 10,980.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,008 : 28,521.72 = 7,318.08 : x
  2. Step 2: Convert to fraction form
    19,008/28,521.72 = 7,318.08/x
  3. Step 3: Cross multiply
    19,008x = 28,521.72 × 7,318.08
  4. Step 4: Simplify right side
    19,008x = 208,724,228.70
  5. Step 5: Solve for x
    x = 208,724,228.70/19,008
  6. Step 6: Final answer
    x = 10,980.86

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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.