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Finding the Fourth Proportional to 8,692.12, 13,038.12 and 2,118.16

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Solution

The fourth proportional to 8,692.12, 13,038.12 and 2,118.16 is: 3,177.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.12 : 13,038.12 = 2,118.16 : x
  2. Step 2: Convert to fraction form
    8,692.12/13,038.12 = 2,118.16/x
  3. Step 3: Cross multiply
    8,692.12x = 13,038.12 × 2,118.16
  4. Step 4: Simplify right side
    8,692.12x = 27,616,824.26
  5. Step 5: Solve for x
    x = 27,616,824.26/8,692.12
  6. Step 6: Final answer
    x = 3,177.23

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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.