Home / 18,919.47-28,378.91-6,448.18

Finding the Fourth Proportional to 18,919.47, 28,378.91 and 6,448.18

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Solution

The fourth proportional to 18,919.47, 28,378.91 and 6,448.18 is: 9,672.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.47 : 28,378.91 = 6,448.18 : x
  2. Step 2: Convert to fraction form
    18,919.47/28,378.91 = 6,448.18/x
  3. Step 3: Cross multiply
    18,919.47x = 28,378.91 × 6,448.18
  4. Step 4: Simplify right side
    18,919.47x = 182,992,361.81
  5. Step 5: Solve for x
    x = 182,992,361.81/18,919.47
  6. Step 6: Final answer
    x = 9,672.17

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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.