Home / 21,719.46-29,971.44-12,157.74

Finding the Fourth Proportional to 21,719.46, 29,971.44 and 12,157.74

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Solution

The fourth proportional to 21,719.46, 29,971.44 and 12,157.74 is: 16,776.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.46 : 29,971.44 = 12,157.74 : x
  2. Step 2: Convert to fraction form
    21,719.46/29,971.44 = 12,157.74/x
  3. Step 3: Cross multiply
    21,719.46x = 29,971.44 × 12,157.74
  4. Step 4: Simplify right side
    21,719.46x = 364,384,974.95
  5. Step 5: Solve for x
    x = 364,384,974.95/21,719.46
  6. Step 6: Final answer
    x = 16,776.89

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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.