Home / 28,415.21-42,609.85-13,631.09

Finding the Fourth Proportional to 28,415.21, 42,609.85 and 13,631.09

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Solution

The fourth proportional to 28,415.21, 42,609.85 and 13,631.09 is: 20,440.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.21 : 42,609.85 = 13,631.09 : x
  2. Step 2: Convert to fraction form
    28,415.21/42,609.85 = 13,631.09/x
  3. Step 3: Cross multiply
    28,415.21x = 42,609.85 × 13,631.09
  4. Step 4: Simplify right side
    28,415.21x = 580,818,453.11
  5. Step 5: Solve for x
    x = 580,818,453.11/28,415.21
  6. Step 6: Final answer
    x = 20,440.41

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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.