Home / 31,128.60-46,692.90-19,291.80

Finding the Fourth Proportional to 31,128.60, 46,692.90 and 19,291.80

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Solution

The fourth proportional to 31,128.60, 46,692.90 and 19,291.80 is: 28,937.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.60 : 46,692.90 = 19,291.80 : x
  2. Step 2: Convert to fraction form
    31,128.60/46,692.90 = 19,291.80/x
  3. Step 3: Cross multiply
    31,128.60x = 46,692.90 × 19,291.80
  4. Step 4: Simplify right side
    31,128.60x = 900,790,088.22
  5. Step 5: Solve for x
    x = 900,790,088.22/31,128.60
  6. Step 6: Final answer
    x = 28,937.70

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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.