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Finding the Fourth Proportional to 18,710.94, 28,047.48 and 12,141.30

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Solution

The fourth proportional to 18,710.94, 28,047.48 and 12,141.30 is: 18,199.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.94 : 28,047.48 = 12,141.30 : x
  2. Step 2: Convert to fraction form
    18,710.94/28,047.48 = 12,141.30/x
  3. Step 3: Cross multiply
    18,710.94x = 28,047.48 × 12,141.30
  4. Step 4: Simplify right side
    18,710.94x = 340,532,868.92
  5. Step 5: Solve for x
    x = 340,532,868.92/18,710.94
  6. Step 6: Final answer
    x = 18,199.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.