Home / 21,122.78-29,156.72-12,173.84

Finding the Fourth Proportional to 21,122.78, 29,156.72 and 12,173.84

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Solution

The fourth proportional to 21,122.78, 29,156.72 and 12,173.84 is: 16,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.78 : 29,156.72 = 12,173.84 : x
  2. Step 2: Convert to fraction form
    21,122.78/29,156.72 = 12,173.84/x
  3. Step 3: Cross multiply
    21,122.78x = 29,156.72 × 12,173.84
  4. Step 4: Simplify right side
    21,122.78x = 354,949,244.20
  5. Step 5: Solve for x
    x = 354,949,244.20/21,122.78
  6. Step 6: Final answer
    x = 16,804.10

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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.