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Finding the Fourth Proportional to 18,920.59, 28,356.58 and 7,834.93

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Solution

The fourth proportional to 18,920.59, 28,356.58 and 7,834.93 is: 11,742.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.59 : 28,356.58 = 7,834.93 : x
  2. Step 2: Convert to fraction form
    18,920.59/28,356.58 = 7,834.93/x
  3. Step 3: Cross multiply
    18,920.59x = 28,356.58 × 7,834.93
  4. Step 4: Simplify right side
    18,920.59x = 222,171,758.24
  5. Step 5: Solve for x
    x = 222,171,758.24/18,920.59
  6. Step 6: Final answer
    x = 11,742.33

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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.