Home / 21,621.80-29,840.50-12,676.87

Finding the Fourth Proportional to 21,621.80, 29,840.50 and 12,676.87

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Solution

The fourth proportional to 21,621.80, 29,840.50 and 12,676.87 is: 17,495.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.80 : 29,840.50 = 12,676.87 : x
  2. Step 2: Convert to fraction form
    21,621.80/29,840.50 = 12,676.87/x
  3. Step 3: Cross multiply
    21,621.80x = 29,840.50 × 12,676.87
  4. Step 4: Simplify right side
    21,621.80x = 378,284,192.38
  5. Step 5: Solve for x
    x = 378,284,192.38/21,621.80
  6. Step 6: Final answer
    x = 17,495.50

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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.