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Finding the Fourth Proportional to 19,692.55, 29,507.87 and 12,285.91

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Solution

The fourth proportional to 19,692.55, 29,507.87 and 12,285.91 is: 18,409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,692.55 : 29,507.87 = 12,285.91 : x
  2. Step 2: Convert to fraction form
    19,692.55/29,507.87 = 12,285.91/x
  3. Step 3: Cross multiply
    19,692.55x = 29,507.87 × 12,285.91
  4. Step 4: Simplify right side
    19,692.55x = 362,530,973.68
  5. Step 5: Solve for x
    x = 362,530,973.68/19,692.55
  6. Step 6: Final answer
    x = 18,409.55

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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.