Home / 20,102.40-27,741.60-12,143.52

Finding the Fourth Proportional to 20,102.40, 27,741.60 and 12,143.52

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Solution

The fourth proportional to 20,102.40, 27,741.60 and 12,143.52 is: 16,758.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.40 : 27,741.60 = 12,143.52 : x
  2. Step 2: Convert to fraction form
    20,102.40/27,741.60 = 12,143.52/x
  3. Step 3: Cross multiply
    20,102.40x = 27,741.60 × 12,143.52
  4. Step 4: Simplify right side
    20,102.40x = 336,880,674.43
  5. Step 5: Solve for x
    x = 336,880,674.43/20,102.40
  6. Step 6: Final answer
    x = 16,758.23

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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.