Home / 21,270.79-29,353.21-11,840.23

Finding the Fourth Proportional to 21,270.79, 29,353.21 and 11,840.23

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Solution

The fourth proportional to 21,270.79, 29,353.21 and 11,840.23 is: 16,339.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.79 : 29,353.21 = 11,840.23 : x
  2. Step 2: Convert to fraction form
    21,270.79/29,353.21 = 11,840.23/x
  3. Step 3: Cross multiply
    21,270.79x = 29,353.21 × 11,840.23
  4. Step 4: Simplify right side
    21,270.79x = 347,548,757.64
  5. Step 5: Solve for x
    x = 347,548,757.64/21,270.79
  6. Step 6: Final answer
    x = 16,339.25

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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.