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Finding the Fourth Proportional to 18,848.76, 28,271.92 and 7,161.67

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Solution

The fourth proportional to 18,848.76, 28,271.92 and 7,161.67 is: 10,742.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,848.76 : 28,271.92 = 7,161.67 : x
  2. Step 2: Convert to fraction form
    18,848.76/28,271.92 = 7,161.67/x
  3. Step 3: Cross multiply
    18,848.76x = 28,271.92 × 7,161.67
  4. Step 4: Simplify right side
    18,848.76x = 202,474,161.31
  5. Step 5: Solve for x
    x = 202,474,161.31/18,848.76
  6. Step 6: Final answer
    x = 10,742.04

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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.