Home / 12,189.15-16,815.51-10,692.45

Finding the Fourth Proportional to 12,189.15, 16,815.51 and 10,692.45

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Solution

The fourth proportional to 12,189.15, 16,815.51 and 10,692.45 is: 14,750.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.15 : 16,815.51 = 10,692.45 : x
  2. Step 2: Convert to fraction form
    12,189.15/16,815.51 = 10,692.45/x
  3. Step 3: Cross multiply
    12,189.15x = 16,815.51 × 10,692.45
  4. Step 4: Simplify right side
    12,189.15x = 179,798,999.90
  5. Step 5: Solve for x
    x = 179,798,999.90/12,189.15
  6. Step 6: Final answer
    x = 14,750.74

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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.