Home / 13,310.40-19,965.60-4,075.20

Finding the Fourth Proportional to 13,310.40, 19,965.60 and 4,075.20

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Solution

The fourth proportional to 13,310.40, 19,965.60 and 4,075.20 is: 6,112.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,310.40 : 19,965.60 = 4,075.20 : x
  2. Step 2: Convert to fraction form
    13,310.40/19,965.60 = 4,075.20/x
  3. Step 3: Cross multiply
    13,310.40x = 19,965.60 × 4,075.20
  4. Step 4: Simplify right side
    13,310.40x = 81,363,813.12
  5. Step 5: Solve for x
    x = 81,363,813.12/13,310.40
  6. Step 6: Final answer
    x = 6,112.80

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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.