Home / 21,917.72-30,237.16-13,416.64

Finding the Fourth Proportional to 21,917.72, 30,237.16 and 13,416.64

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Solution

The fourth proportional to 21,917.72, 30,237.16 and 13,416.64 is: 18,509.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.72 : 30,237.16 = 13,416.64 : x
  2. Step 2: Convert to fraction form
    21,917.72/30,237.16 = 13,416.64/x
  3. Step 3: Cross multiply
    21,917.72x = 30,237.16 × 13,416.64
  4. Step 4: Simplify right side
    21,917.72x = 405,681,090.34
  5. Step 5: Solve for x
    x = 405,681,090.34/21,917.72
  6. Step 6: Final answer
    x = 18,509.27

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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.