Home / 27,868.35-38,420.36-19,896.72

Finding the Fourth Proportional to 27,868.35, 38,420.36 and 19,896.72

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Solution

The fourth proportional to 27,868.35, 38,420.36 and 19,896.72 is: 27,430.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,868.35 : 38,420.36 = 19,896.72 : x
  2. Step 2: Convert to fraction form
    27,868.35/38,420.36 = 19,896.72/x
  3. Step 3: Cross multiply
    27,868.35x = 38,420.36 × 19,896.72
  4. Step 4: Simplify right side
    27,868.35x = 764,439,045.74
  5. Step 5: Solve for x
    x = 764,439,045.74/27,868.35
  6. Step 6: Final answer
    x = 27,430.37

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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.