Home / 12,421.58-18,628.40-4,099.72

Finding the Fourth Proportional to 12,421.58, 18,628.40 and 4,099.72

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Solution

The fourth proportional to 12,421.58, 18,628.40 and 4,099.72 is: 6,148.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.58 : 18,628.40 = 4,099.72 : x
  2. Step 2: Convert to fraction form
    12,421.58/18,628.40 = 4,099.72/x
  3. Step 3: Cross multiply
    12,421.58x = 18,628.40 × 4,099.72
  4. Step 4: Simplify right side
    12,421.58x = 76,371,224.05
  5. Step 5: Solve for x
    x = 76,371,224.05/12,421.58
  6. Step 6: Final answer
    x = 6,148.27

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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.