Home / 10,785.20-16,172.40-4,935.20

Finding the Fourth Proportional to 10,785.20, 16,172.40 and 4,935.20

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Solution

The fourth proportional to 10,785.20, 16,172.40 and 4,935.20 is: 7,400.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.20 : 16,172.40 = 4,935.20 : x
  2. Step 2: Convert to fraction form
    10,785.20/16,172.40 = 4,935.20/x
  3. Step 3: Cross multiply
    10,785.20x = 16,172.40 × 4,935.20
  4. Step 4: Simplify right side
    10,785.20x = 79,814,028.48
  5. Step 5: Solve for x
    x = 79,814,028.48/10,785.20
  6. Step 6: Final answer
    x = 7,400.33

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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.