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Finding the Fourth Proportional to 39,155.80, 58,737.30 and 11,075.80

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Solution

The fourth proportional to 39,155.80, 58,737.30 and 11,075.80 is: 16,614.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,155.80 : 58,737.30 = 11,075.80 : x
  2. Step 2: Convert to fraction form
    39,155.80/58,737.30 = 11,075.80/x
  3. Step 3: Cross multiply
    39,155.80x = 58,737.30 × 11,075.80
  4. Step 4: Simplify right side
    39,155.80x = 650,562,587.34
  5. Step 5: Solve for x
    x = 650,562,587.34/39,155.80
  6. Step 6: Final answer
    x = 16,614.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.