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Finding the Fourth Proportional to 19,128.30, 28,692.30 and 11,331.50

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Solution

The fourth proportional to 19,128.30, 28,692.30 and 11,331.50 is: 16,997.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.30 : 28,692.30 = 11,331.50 : x
  2. Step 2: Convert to fraction form
    19,128.30/28,692.30 = 11,331.50/x
  3. Step 3: Cross multiply
    19,128.30x = 28,692.30 × 11,331.50
  4. Step 4: Simplify right side
    19,128.30x = 325,126,797.45
  5. Step 5: Solve for x
    x = 325,126,797.45/19,128.30
  6. Step 6: Final answer
    x = 16,997.16

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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.