Home / 20,102.69-27,741.75-12,143.45

Finding the Fourth Proportional to 20,102.69, 27,741.75 and 12,143.45

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Solution

The fourth proportional to 20,102.69, 27,741.75 and 12,143.45 is: 16,757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.69 : 27,741.75 = 12,143.45 : x
  2. Step 2: Convert to fraction form
    20,102.69/27,741.75 = 12,143.45/x
  3. Step 3: Cross multiply
    20,102.69x = 27,741.75 × 12,143.45
  4. Step 4: Simplify right side
    20,102.69x = 336,880,554.04
  5. Step 5: Solve for x
    x = 336,880,554.04/20,102.69
  6. Step 6: Final answer
    x = 16,757.98

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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.