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Finding the Fourth Proportional to 21,750.76, 30,014.62 and 12,796.53

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Solution

The fourth proportional to 21,750.76, 30,014.62 and 12,796.53 is: 17,658.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.76 : 30,014.62 = 12,796.53 : x
  2. Step 2: Convert to fraction form
    21,750.76/30,014.62 = 12,796.53/x
  3. Step 3: Cross multiply
    21,750.76x = 30,014.62 × 12,796.53
  4. Step 4: Simplify right side
    21,750.76x = 384,082,985.27
  5. Step 5: Solve for x
    x = 384,082,985.27/21,750.76
  6. Step 6: Final answer
    x = 17,658.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.