Home / 21,858.48-30,178.44-15,141.62

Finding the Fourth Proportional to 21,858.48, 30,178.44 and 15,141.62

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Solution

The fourth proportional to 21,858.48, 30,178.44 and 15,141.62 is: 20,904.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.48 : 30,178.44 = 15,141.62 : x
  2. Step 2: Convert to fraction form
    21,858.48/30,178.44 = 15,141.62/x
  3. Step 3: Cross multiply
    21,858.48x = 30,178.44 × 15,141.62
  4. Step 4: Simplify right side
    21,858.48x = 456,950,546.12
  5. Step 5: Solve for x
    x = 456,950,546.12/21,858.48
  6. Step 6: Final answer
    x = 20,904.96

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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.