Home / 12,840.20-19,211.70-8,466.20

Finding the Fourth Proportional to 12,840.20, 19,211.70 and 8,466.20

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Solution

The fourth proportional to 12,840.20, 19,211.70 and 8,466.20 is: 12,667.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.20 : 19,211.70 = 8,466.20 : x
  2. Step 2: Convert to fraction form
    12,840.20/19,211.70 = 8,466.20/x
  3. Step 3: Cross multiply
    12,840.20x = 19,211.70 × 8,466.20
  4. Step 4: Simplify right side
    12,840.20x = 162,650,094.54
  5. Step 5: Solve for x
    x = 162,650,094.54/12,840.20
  6. Step 6: Final answer
    x = 12,667.26

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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.