Home / 18,721.40-25,840.50-10,764.52

Finding the Fourth Proportional to 18,721.40, 25,840.50 and 10,764.52

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Solution

The fourth proportional to 18,721.40, 25,840.50 and 10,764.52 is: 14,857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.40 : 25,840.50 = 10,764.52 : x
  2. Step 2: Convert to fraction form
    18,721.40/25,840.50 = 10,764.52/x
  3. Step 3: Cross multiply
    18,721.40x = 25,840.50 × 10,764.52
  4. Step 4: Simplify right side
    18,721.40x = 278,160,579.06
  5. Step 5: Solve for x
    x = 278,160,579.06/18,721.40
  6. Step 6: Final answer
    x = 14,857.89

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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.