Home / 21,719.76-29,975.24-12,290.16

Finding the Fourth Proportional to 21,719.76, 29,975.24 and 12,290.16

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Solution

The fourth proportional to 21,719.76, 29,975.24 and 12,290.16 is: 16,961.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.76 : 29,975.24 = 12,290.16 : x
  2. Step 2: Convert to fraction form
    21,719.76/29,975.24 = 12,290.16/x
  3. Step 3: Cross multiply
    21,719.76x = 29,975.24 × 12,290.16
  4. Step 4: Simplify right side
    21,719.76x = 368,400,495.64
  5. Step 5: Solve for x
    x = 368,400,495.64/21,719.76
  6. Step 6: Final answer
    x = 16,961.54

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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.