Home / 21,006.65-28,988.03-13,048.73

Finding the Fourth Proportional to 21,006.65, 28,988.03 and 13,048.73

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Solution

The fourth proportional to 21,006.65, 28,988.03 and 13,048.73 is: 18,006.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.65 : 28,988.03 = 13,048.73 : x
  2. Step 2: Convert to fraction form
    21,006.65/28,988.03 = 13,048.73/x
  3. Step 3: Cross multiply
    21,006.65x = 28,988.03 × 13,048.73
  4. Step 4: Simplify right side
    21,006.65x = 378,256,766.52
  5. Step 5: Solve for x
    x = 378,256,766.52/21,006.65
  6. Step 6: Final answer
    x = 18,006.53

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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.