Home / 21,621.58-29,838.62-12,189.94

Finding the Fourth Proportional to 21,621.58, 29,838.62 and 12,189.94

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Solution

The fourth proportional to 21,621.58, 29,838.62 and 12,189.94 is: 16,822.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.58 : 29,838.62 = 12,189.94 : x
  2. Step 2: Convert to fraction form
    21,621.58/29,838.62 = 12,189.94/x
  3. Step 3: Cross multiply
    21,621.58x = 29,838.62 × 12,189.94
  4. Step 4: Simplify right side
    21,621.58x = 363,730,943.36
  5. Step 5: Solve for x
    x = 363,730,943.36/21,621.58
  6. Step 6: Final answer
    x = 16,822.59

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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.