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Finding the Fourth Proportional to 18,533.80, 27,801.90 and 9,785.80

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Solution

The fourth proportional to 18,533.80, 27,801.90 and 9,785.80 is: 14,679.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,533.80 : 27,801.90 = 9,785.80 : x
  2. Step 2: Convert to fraction form
    18,533.80/27,801.90 = 9,785.80/x
  3. Step 3: Cross multiply
    18,533.80x = 27,801.90 × 9,785.80
  4. Step 4: Simplify right side
    18,533.80x = 272,063,833.02
  5. Step 5: Solve for x
    x = 272,063,833.02/18,533.80
  6. Step 6: Final answer
    x = 14,679.33

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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.