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Finding the Fourth Proportional to 12,774.98, 19,137.54 and 7,211.48

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Solution

The fourth proportional to 12,774.98, 19,137.54 and 7,211.48 is: 10,803.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,774.98 : 19,137.54 = 7,211.48 : x
  2. Step 2: Convert to fraction form
    12,774.98/19,137.54 = 7,211.48/x
  3. Step 3: Cross multiply
    12,774.98x = 19,137.54 × 7,211.48
  4. Step 4: Simplify right side
    12,774.98x = 138,009,986.96
  5. Step 5: Solve for x
    x = 138,009,986.96/12,774.98
  6. Step 6: Final answer
    x = 10,803.15

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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.