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Finding the Fourth Proportional to 18,883.56, 28,328.75 and 7,784.07

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Solution

The fourth proportional to 18,883.56, 28,328.75 and 7,784.07 is: 11,677.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,883.56 : 28,328.75 = 7,784.07 : x
  2. Step 2: Convert to fraction form
    18,883.56/28,328.75 = 7,784.07/x
  3. Step 3: Cross multiply
    18,883.56x = 28,328.75 × 7,784.07
  4. Step 4: Simplify right side
    18,883.56x = 220,512,934.09
  5. Step 5: Solve for x
    x = 220,512,934.09/18,883.56
  6. Step 6: Final answer
    x = 11,677.51

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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.