Home / 18,123.51-27,171.59-11,885.09

Finding the Fourth Proportional to 18,123.51, 27,171.59 and 11,885.09

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Solution

The fourth proportional to 18,123.51, 27,171.59 and 11,885.09 is: 17,818.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.51 : 27,171.59 = 11,885.09 : x
  2. Step 2: Convert to fraction form
    18,123.51/27,171.59 = 11,885.09/x
  3. Step 3: Cross multiply
    18,123.51x = 27,171.59 × 11,885.09
  4. Step 4: Simplify right side
    18,123.51x = 322,936,838.50
  5. Step 5: Solve for x
    x = 322,936,838.50/18,123.51
  6. Step 6: Final answer
    x = 17,818.67

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1.5x scale

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.