Home / 21,156.08-29,181.17-13,611.93

Finding the Fourth Proportional to 21,156.08, 29,181.17 and 13,611.93

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Solution

The fourth proportional to 21,156.08, 29,181.17 and 13,611.93 is: 18,775.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.08 : 29,181.17 = 13,611.93 : x
  2. Step 2: Convert to fraction form
    21,156.08/29,181.17 = 13,611.93/x
  3. Step 3: Cross multiply
    21,156.08x = 29,181.17 × 13,611.93
  4. Step 4: Simplify right side
    21,156.08x = 397,211,975.30
  5. Step 5: Solve for x
    x = 397,211,975.30/21,156.08
  6. Step 6: Final answer
    x = 18,775.32

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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.