Home / 18,930.08-28,395.22-7,830.75

Finding the Fourth Proportional to 18,930.08, 28,395.22 and 7,830.75

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Solution

The fourth proportional to 18,930.08, 28,395.22 and 7,830.75 is: 11,746.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.08 : 28,395.22 = 7,830.75 : x
  2. Step 2: Convert to fraction form
    18,930.08/28,395.22 = 7,830.75/x
  3. Step 3: Cross multiply
    18,930.08x = 28,395.22 × 7,830.75
  4. Step 4: Simplify right side
    18,930.08x = 222,355,869.02
  5. Step 5: Solve for x
    x = 222,355,869.02/18,930.08
  6. Step 6: Final answer
    x = 11,746.17

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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.