Home / 13,692.79-18,878.93-11,427.39

Finding the Fourth Proportional to 13,692.79, 18,878.93 and 11,427.39

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Solution

The fourth proportional to 13,692.79, 18,878.93 and 11,427.39 is: 15,755.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.79 : 18,878.93 = 11,427.39 : x
  2. Step 2: Convert to fraction form
    13,692.79/18,878.93 = 11,427.39/x
  3. Step 3: Cross multiply
    13,692.79x = 18,878.93 × 11,427.39
  4. Step 4: Simplify right side
    13,692.79x = 215,736,913.75
  5. Step 5: Solve for x
    x = 215,736,913.75/13,692.79
  6. Step 6: Final answer
    x = 15,755.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.