Home / 12,161.36-16,782.55-6,857.89

Finding the Fourth Proportional to 12,161.36, 16,782.55 and 6,857.89

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Solution

The fourth proportional to 12,161.36, 16,782.55 and 6,857.89 is: 9,463.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,161.36 : 16,782.55 = 6,857.89 : x
  2. Step 2: Convert to fraction form
    12,161.36/16,782.55 = 6,857.89/x
  3. Step 3: Cross multiply
    12,161.36x = 16,782.55 × 6,857.89
  4. Step 4: Simplify right side
    12,161.36x = 115,092,881.82
  5. Step 5: Solve for x
    x = 115,092,881.82/12,161.36
  6. Step 6: Final answer
    x = 9,463.82

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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.