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Finding the Fourth Proportional to 19,369.10, 26,719.20 and 15,992.21

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Solution

The fourth proportional to 19,369.10, 26,719.20 and 15,992.21 is: 22,060.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,369.10 : 26,719.20 = 15,992.21 : x
  2. Step 2: Convert to fraction form
    19,369.10/26,719.20 = 15,992.21/x
  3. Step 3: Cross multiply
    19,369.10x = 26,719.20 × 15,992.21
  4. Step 4: Simplify right side
    19,369.10x = 427,299,124.23
  5. Step 5: Solve for x
    x = 427,299,124.23/19,369.10
  6. Step 6: Final answer
    x = 22,060.86

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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.