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Finding the Fourth Proportional to 18,973.85, 28,468.98 and 7,284.35

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Solution

The fourth proportional to 18,973.85, 28,468.98 and 7,284.35 is: 10,929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.85 : 28,468.98 = 7,284.35 : x
  2. Step 2: Convert to fraction form
    18,973.85/28,468.98 = 7,284.35/x
  3. Step 3: Cross multiply
    18,973.85x = 28,468.98 × 7,284.35
  4. Step 4: Simplify right side
    18,973.85x = 207,378,014.46
  5. Step 5: Solve for x
    x = 207,378,014.46/18,973.85
  6. Step 6: Final answer
    x = 10,929.68

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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.