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Finding the Fourth Proportional to 25,692.80, 38,539.20 and 21,804.80

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Solution

The fourth proportional to 25,692.80, 38,539.20 and 21,804.80 is: 32,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,692.80 : 38,539.20 = 21,804.80 : x
  2. Step 2: Convert to fraction form
    25,692.80/38,539.20 = 21,804.80/x
  3. Step 3: Cross multiply
    25,692.80x = 38,539.20 × 21,804.80
  4. Step 4: Simplify right side
    25,692.80x = 840,339,548.16
  5. Step 5: Solve for x
    x = 840,339,548.16/25,692.80
  6. Step 6: Final answer
    x = 32,707.20

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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.