Home / 21,186.56-31,781.36-5,604

Finding the Fourth Proportional to 21,186.56, 31,781.36 and 5,604

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Solution

The fourth proportional to 21,186.56, 31,781.36 and 5,604 is: 8,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.56 : 31,781.36 = 5,604 : x
  2. Step 2: Convert to fraction form
    21,186.56/31,781.36 = 5,604/x
  3. Step 3: Cross multiply
    21,186.56x = 31,781.36 × 5,604
  4. Step 4: Simplify right side
    21,186.56x = 178,102,741.44
  5. Step 5: Solve for x
    x = 178,102,741.44/21,186.56
  6. Step 6: Final answer
    x = 8,406.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.