Home / 28,385.80-39,172.98-16,453

Finding the Fourth Proportional to 28,385.80, 39,172.98 and 16,453

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Solution

The fourth proportional to 28,385.80, 39,172.98 and 16,453 is: 22,705.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.80 : 39,172.98 = 16,453 : x
  2. Step 2: Convert to fraction form
    28,385.80/39,172.98 = 16,453/x
  3. Step 3: Cross multiply
    28,385.80x = 39,172.98 × 16,453
  4. Step 4: Simplify right side
    28,385.80x = 644,513,039.94
  5. Step 5: Solve for x
    x = 644,513,039.94/28,385.80
  6. Step 6: Final answer
    x = 22,705.47

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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.