Home / 12,392.09-17,089.35-8,135.64

Finding the Fourth Proportional to 12,392.09, 17,089.35 and 8,135.64

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Solution

The fourth proportional to 12,392.09, 17,089.35 and 8,135.64 is: 11,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.09 : 17,089.35 = 8,135.64 : x
  2. Step 2: Convert to fraction form
    12,392.09/17,089.35 = 8,135.64/x
  3. Step 3: Cross multiply
    12,392.09x = 17,089.35 × 8,135.64
  4. Step 4: Simplify right side
    12,392.09x = 139,032,837.57
  5. Step 5: Solve for x
    x = 139,032,837.57/12,392.09
  6. Step 6: Final answer
    x = 11,219.48

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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.