Home / 28,387.80-39,175.74-16,455

Finding the Fourth Proportional to 28,387.80, 39,175.74 and 16,455

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Solution

The fourth proportional to 28,387.80, 39,175.74 and 16,455 is: 22,708.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.80 : 39,175.74 = 16,455 : x
  2. Step 2: Convert to fraction form
    28,387.80/39,175.74 = 16,455/x
  3. Step 3: Cross multiply
    28,387.80x = 39,175.74 × 16,455
  4. Step 4: Simplify right side
    28,387.80x = 644,636,801.70
  5. Step 5: Solve for x
    x = 644,636,801.70/28,387.80
  6. Step 6: Final answer
    x = 22,708.23

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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.