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Finding the Fourth Proportional to 18,873.95, 28,290.16 and 7,774.58

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Solution

The fourth proportional to 18,873.95, 28,290.16 and 7,774.58 is: 11,653.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.95 : 28,290.16 = 7,774.58 : x
  2. Step 2: Convert to fraction form
    18,873.95/28,290.16 = 7,774.58/x
  3. Step 3: Cross multiply
    18,873.95x = 28,290.16 × 7,774.58
  4. Step 4: Simplify right side
    18,873.95x = 219,944,091.14
  5. Step 5: Solve for x
    x = 219,944,091.14/18,873.95
  6. Step 6: Final answer
    x = 11,653.32

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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.