Home / 20,142.99-27,810.95-12,199.05

Finding the Fourth Proportional to 20,142.99, 27,810.95 and 12,199.05

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Solution

The fourth proportional to 20,142.99, 27,810.95 and 12,199.05 is: 16,842.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.99 : 27,810.95 = 12,199.05 : x
  2. Step 2: Convert to fraction form
    20,142.99/27,810.95 = 12,199.05/x
  3. Step 3: Cross multiply
    20,142.99x = 27,810.95 × 12,199.05
  4. Step 4: Simplify right side
    20,142.99x = 339,267,108.60
  5. Step 5: Solve for x
    x = 339,267,108.60/20,142.99
  6. Step 6: Final answer
    x = 16,842.94

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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.