Home / 21,190.16-29,245.32-12,809.36

Finding the Fourth Proportional to 21,190.16, 29,245.32 and 12,809.36

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Solution

The fourth proportional to 21,190.16, 29,245.32 and 12,809.36 is: 17,678.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.16 : 29,245.32 = 12,809.36 : x
  2. Step 2: Convert to fraction form
    21,190.16/29,245.32 = 12,809.36/x
  3. Step 3: Cross multiply
    21,190.16x = 29,245.32 × 12,809.36
  4. Step 4: Simplify right side
    21,190.16x = 374,613,832.20
  5. Step 5: Solve for x
    x = 374,613,832.20/21,190.16
  6. Step 6: Final answer
    x = 17,678.67

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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.