Home / 12,239.20-18,358.80-4,447

Finding the Fourth Proportional to 12,239.20, 18,358.80 and 4,447

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Solution

The fourth proportional to 12,239.20, 18,358.80 and 4,447 is: 6,670.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.20 : 18,358.80 = 4,447 : x
  2. Step 2: Convert to fraction form
    12,239.20/18,358.80 = 4,447/x
  3. Step 3: Cross multiply
    12,239.20x = 18,358.80 × 4,447
  4. Step 4: Simplify right side
    12,239.20x = 81,641,583.60
  5. Step 5: Solve for x
    x = 81,641,583.60/12,239.20
  6. Step 6: Final answer
    x = 6,670.50

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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.