Home / 19,311.21-28,938.87-9,439.34

Finding the Fourth Proportional to 19,311.21, 28,938.87 and 9,439.34

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Solution

The fourth proportional to 19,311.21, 28,938.87 and 9,439.34 is: 14,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.21 : 28,938.87 = 9,439.34 : x
  2. Step 2: Convert to fraction form
    19,311.21/28,938.87 = 9,439.34/x
  3. Step 3: Cross multiply
    19,311.21x = 28,938.87 × 9,439.34
  4. Step 4: Simplify right side
    19,311.21x = 273,163,688.45
  5. Step 5: Solve for x
    x = 273,163,688.45/19,311.21
  6. Step 6: Final answer
    x = 14,145.34

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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.