Home / 28,477.81-39,300.49-15,731.65

Finding the Fourth Proportional to 28,477.81, 39,300.49 and 15,731.65

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Solution

The fourth proportional to 28,477.81, 39,300.49 and 15,731.65 is: 21,710.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,477.81 : 39,300.49 = 15,731.65 : x
  2. Step 2: Convert to fraction form
    28,477.81/39,300.49 = 15,731.65/x
  3. Step 3: Cross multiply
    28,477.81x = 39,300.49 × 15,731.65
  4. Step 4: Simplify right side
    28,477.81x = 618,261,553.51
  5. Step 5: Solve for x
    x = 618,261,553.51/28,477.81
  6. Step 6: Final answer
    x = 21,710.29

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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.