Home / 21,704.61-29,980.49-14,978.37

Finding the Fourth Proportional to 21,704.61, 29,980.49 and 14,978.37

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Solution

The fourth proportional to 21,704.61, 29,980.49 and 14,978.37 is: 20,689.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,704.61 : 29,980.49 = 14,978.37 : x
  2. Step 2: Convert to fraction form
    21,704.61/29,980.49 = 14,978.37/x
  3. Step 3: Cross multiply
    21,704.61x = 29,980.49 × 14,978.37
  4. Step 4: Simplify right side
    21,704.61x = 449,058,872.00
  5. Step 5: Solve for x
    x = 449,058,872.00/21,704.61
  6. Step 6: Final answer
    x = 20,689.56

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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.