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Finding the Fourth Proportional to 18,692.88, 28,039 and 5,554.12

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Solution

The fourth proportional to 18,692.88, 28,039 and 5,554.12 is: 8,331.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.88 : 28,039 = 5,554.12 : x
  2. Step 2: Convert to fraction form
    18,692.88/28,039 = 5,554.12/x
  3. Step 3: Cross multiply
    18,692.88x = 28,039 × 5,554.12
  4. Step 4: Simplify right side
    18,692.88x = 155,731,970.68
  5. Step 5: Solve for x
    x = 155,731,970.68/18,692.88
  6. Step 6: Final answer
    x = 8,331.08

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1.5x scale

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.