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Finding the Fourth Proportional to 18,922.64, 28,364.76 and 9,047.44

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Solution

The fourth proportional to 18,922.64, 28,364.76 and 9,047.44 is: 13,561.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.64 : 28,364.76 = 9,047.44 : x
  2. Step 2: Convert to fraction form
    18,922.64/28,364.76 = 9,047.44/x
  3. Step 3: Cross multiply
    18,922.64x = 28,364.76 × 9,047.44
  4. Step 4: Simplify right side
    18,922.64x = 256,628,464.21
  5. Step 5: Solve for x
    x = 256,628,464.21/18,922.64
  6. Step 6: Final answer
    x = 13,561.98

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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.