Home / 21,507.36-29,680.16-12,078.96

Finding the Fourth Proportional to 21,507.36, 29,680.16 and 12,078.96

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Solution

The fourth proportional to 21,507.36, 29,680.16 and 12,078.96 is: 16,668.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.36 : 29,680.16 = 12,078.96 : x
  2. Step 2: Convert to fraction form
    21,507.36/29,680.16 = 12,078.96/x
  3. Step 3: Cross multiply
    21,507.36x = 29,680.16 × 12,078.96
  4. Step 4: Simplify right side
    21,507.36x = 358,505,465.43
  5. Step 5: Solve for x
    x = 358,505,465.43/21,507.36
  6. Step 6: Final answer
    x = 16,668.97

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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.