Home / 21,623.02-29,838.27-12,189.58

Finding the Fourth Proportional to 21,623.02, 29,838.27 and 12,189.58

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Solution

The fourth proportional to 21,623.02, 29,838.27 and 12,189.58 is: 16,820.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.02 : 29,838.27 = 12,189.58 : x
  2. Step 2: Convert to fraction form
    21,623.02/29,838.27 = 12,189.58/x
  3. Step 3: Cross multiply
    21,623.02x = 29,838.27 × 12,189.58
  4. Step 4: Simplify right side
    21,623.02x = 363,715,979.23
  5. Step 5: Solve for x
    x = 363,715,979.23/21,623.02
  6. Step 6: Final answer
    x = 16,820.78

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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.