Home / 8,918.19-12,307.21-4,939.37

Finding the Fourth Proportional to 8,918.19, 12,307.21 and 4,939.37

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Solution

The fourth proportional to 8,918.19, 12,307.21 and 4,939.37 is: 6,816.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.19 : 12,307.21 = 4,939.37 : x
  2. Step 2: Convert to fraction form
    8,918.19/12,307.21 = 4,939.37/x
  3. Step 3: Cross multiply
    8,918.19x = 12,307.21 × 4,939.37
  4. Step 4: Simplify right side
    8,918.19x = 60,789,839.16
  5. Step 5: Solve for x
    x = 60,789,839.16/8,918.19
  6. Step 6: Final answer
    x = 6,816.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.