Home / 28,297.14-39,051.29-15,721.89

Finding the Fourth Proportional to 28,297.14, 39,051.29 and 15,721.89

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Solution

The fourth proportional to 28,297.14, 39,051.29 and 15,721.89 is: 21,696.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,297.14 : 39,051.29 = 15,721.89 : x
  2. Step 2: Convert to fraction form
    28,297.14/39,051.29 = 15,721.89/x
  3. Step 3: Cross multiply
    28,297.14x = 39,051.29 × 15,721.89
  4. Step 4: Simplify right side
    28,297.14x = 613,960,085.74
  5. Step 5: Solve for x
    x = 613,960,085.74/28,297.14
  6. Step 6: Final answer
    x = 21,696.90

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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.