Home / 21,679.07-29,916.47-12,118.97

Finding the Fourth Proportional to 21,679.07, 29,916.47 and 12,118.97

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Solution

The fourth proportional to 21,679.07, 29,916.47 and 12,118.97 is: 16,723.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.07 : 29,916.47 = 12,118.97 : x
  2. Step 2: Convert to fraction form
    21,679.07/29,916.47 = 12,118.97/x
  3. Step 3: Cross multiply
    21,679.07x = 29,916.47 × 12,118.97
  4. Step 4: Simplify right side
    21,679.07x = 362,556,907.52
  5. Step 5: Solve for x
    x = 362,556,907.52/21,679.07
  6. Step 6: Final answer
    x = 16,723.83

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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.