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Finding the Fourth Proportional to 18,903.64, 28,354.09 and 9,040.27

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Solution

The fourth proportional to 18,903.64, 28,354.09 and 9,040.27 is: 13,559.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.64 : 28,354.09 = 9,040.27 : x
  2. Step 2: Convert to fraction form
    18,903.64/28,354.09 = 9,040.27/x
  3. Step 3: Cross multiply
    18,903.64x = 28,354.09 × 9,040.27
  4. Step 4: Simplify right side
    18,903.64x = 256,328,552.67
  5. Step 5: Solve for x
    x = 256,328,552.67/18,903.64
  6. Step 6: Final answer
    x = 13,559.75

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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.