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Finding the Fourth Proportional to 12,483.87, 18,722.44 and 4,987.09

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Solution

The fourth proportional to 12,483.87, 18,722.44 and 4,987.09 is: 7,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,483.87 : 18,722.44 = 4,987.09 : x
  2. Step 2: Convert to fraction form
    12,483.87/18,722.44 = 4,987.09/x
  3. Step 3: Cross multiply
    12,483.87x = 18,722.44 × 4,987.09
  4. Step 4: Simplify right side
    12,483.87x = 93,370,493.30
  5. Step 5: Solve for x
    x = 93,370,493.30/12,483.87
  6. Step 6: Final answer
    x = 7,479.29

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1.5x scale

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.