Home / 20,102.99-27,742.10-12,143.72

Finding the Fourth Proportional to 20,102.99, 27,742.10 and 12,143.72

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Solution

The fourth proportional to 20,102.99, 27,742.10 and 12,143.72 is: 16,758.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.99 : 27,742.10 = 12,143.72 : x
  2. Step 2: Convert to fraction form
    20,102.99/27,742.10 = 12,143.72/x
  3. Step 3: Cross multiply
    20,102.99x = 27,742.10 × 12,143.72
  4. Step 4: Simplify right side
    20,102.99x = 336,892,303.25
  5. Step 5: Solve for x
    x = 336,892,303.25/20,102.99
  6. Step 6: Final answer
    x = 16,758.32

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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.