Home / 13,858.70-19,138.47-11,857.55

Finding the Fourth Proportional to 13,858.70, 19,138.47 and 11,857.55

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Solution

The fourth proportional to 13,858.70, 19,138.47 and 11,857.55 is: 16,374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,858.70 : 19,138.47 = 11,857.55 : x
  2. Step 2: Convert to fraction form
    13,858.70/19,138.47 = 11,857.55/x
  3. Step 3: Cross multiply
    13,858.70x = 19,138.47 × 11,857.55
  4. Step 4: Simplify right side
    13,858.70x = 226,935,364.95
  5. Step 5: Solve for x
    x = 226,935,364.95/13,858.70
  6. Step 6: Final answer
    x = 16,374.94

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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.