Home / 12,905.82-19,345.02-8,211.06

Finding the Fourth Proportional to 12,905.82, 19,345.02 and 8,211.06

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Solution

The fourth proportional to 12,905.82, 19,345.02 and 8,211.06 is: 12,307.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.82 : 19,345.02 = 8,211.06 : x
  2. Step 2: Convert to fraction form
    12,905.82/19,345.02 = 8,211.06/x
  3. Step 3: Cross multiply
    12,905.82x = 19,345.02 × 8,211.06
  4. Step 4: Simplify right side
    12,905.82x = 158,843,119.92
  5. Step 5: Solve for x
    x = 158,843,119.92/12,905.82
  6. Step 6: Final answer
    x = 12,307.87

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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.