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Finding the Fourth Proportional to 19,007.90, 28,511.70 and 4,967.90

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Solution

The fourth proportional to 19,007.90, 28,511.70 and 4,967.90 is: 7,451.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.90 : 28,511.70 = 4,967.90 : x
  2. Step 2: Convert to fraction form
    19,007.90/28,511.70 = 4,967.90/x
  3. Step 3: Cross multiply
    19,007.90x = 28,511.70 × 4,967.90
  4. Step 4: Simplify right side
    19,007.90x = 141,643,274.43
  5. Step 5: Solve for x
    x = 141,643,274.43/19,007.90
  6. Step 6: Final answer
    x = 7,451.81

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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.