Home / 12,918.64-19,378.06-3,559.17

Finding the Fourth Proportional to 12,918.64, 19,378.06 and 3,559.17

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Solution

The fourth proportional to 12,918.64, 19,378.06 and 3,559.17 is: 5,338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.64 : 19,378.06 = 3,559.17 : x
  2. Step 2: Convert to fraction form
    12,918.64/19,378.06 = 3,559.17/x
  3. Step 3: Cross multiply
    12,918.64x = 19,378.06 × 3,559.17
  4. Step 4: Simplify right side
    12,918.64x = 68,969,809.81
  5. Step 5: Solve for x
    x = 68,969,809.81/12,918.64
  6. Step 6: Final answer
    x = 5,338.78

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1.5x scale

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.