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Finding the Fourth Proportional to 19,977.90, 29,765.78 and 19,692.78

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Solution

The fourth proportional to 19,977.90, 29,765.78 and 19,692.78 is: 29,340.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.90 : 29,765.78 = 19,692.78 : x
  2. Step 2: Convert to fraction form
    19,977.90/29,765.78 = 19,692.78/x
  3. Step 3: Cross multiply
    19,977.90x = 29,765.78 × 19,692.78
  4. Step 4: Simplify right side
    19,977.90x = 586,170,858.60
  5. Step 5: Solve for x
    x = 586,170,858.60/19,977.90
  6. Step 6: Final answer
    x = 29,340.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.