Home / 31,128.62-46,692.87-12,421.79

Finding the Fourth Proportional to 31,128.62, 46,692.87 and 12,421.79

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Solution

The fourth proportional to 31,128.62, 46,692.87 and 12,421.79 is: 18,632.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.62 : 46,692.87 = 12,421.79 : x
  2. Step 2: Convert to fraction form
    31,128.62/46,692.87 = 12,421.79/x
  3. Step 3: Cross multiply
    31,128.62x = 46,692.87 × 12,421.79
  4. Step 4: Simplify right side
    31,128.62x = 580,009,025.64
  5. Step 5: Solve for x
    x = 580,009,025.64/31,128.62
  6. Step 6: Final answer
    x = 18,632.66

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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.