Home / 45,321.04-68,003.88-20,378.71

Finding the Fourth Proportional to 45,321.04, 68,003.88 and 20,378.71

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Solution

The fourth proportional to 45,321.04, 68,003.88 and 20,378.71 is: 30,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,321.04 : 68,003.88 = 20,378.71 : x
  2. Step 2: Convert to fraction form
    45,321.04/68,003.88 = 20,378.71/x
  3. Step 3: Cross multiply
    45,321.04x = 68,003.88 × 20,378.71
  4. Step 4: Simplify right side
    45,321.04x = 1,385,831,349.39
  5. Step 5: Solve for x
    x = 1,385,831,349.39/45,321.04
  6. Step 6: Final answer
    x = 30,578.10

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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.