Home / 21,644.22-29,848.32-13,147.74

Finding the Fourth Proportional to 21,644.22, 29,848.32 and 13,147.74

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Solution

The fourth proportional to 21,644.22, 29,848.32 and 13,147.74 is: 18,131.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,644.22 : 29,848.32 = 13,147.74 : x
  2. Step 2: Convert to fraction form
    21,644.22/29,848.32 = 13,147.74/x
  3. Step 3: Cross multiply
    21,644.22x = 29,848.32 × 13,147.74
  4. Step 4: Simplify right side
    21,644.22x = 392,437,950.80
  5. Step 5: Solve for x
    x = 392,437,950.80/21,644.22
  6. Step 6: Final answer
    x = 18,131.30

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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.