Home / 8,918.36-13,379.88-3,075.40

Finding the Fourth Proportional to 8,918.36, 13,379.88 and 3,075.40

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Solution

The fourth proportional to 8,918.36, 13,379.88 and 3,075.40 is: 4,613.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.36 : 13,379.88 = 3,075.40 : x
  2. Step 2: Convert to fraction form
    8,918.36/13,379.88 = 3,075.40/x
  3. Step 3: Cross multiply
    8,918.36x = 13,379.88 × 3,075.40
  4. Step 4: Simplify right side
    8,918.36x = 41,148,482.95
  5. Step 5: Solve for x
    x = 41,148,482.95/8,918.36
  6. Step 6: Final answer
    x = 4,613.91

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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.