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Finding the Fourth Proportional to 18,005.86, 27,008.70 and 9,235.90

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Solution

The fourth proportional to 18,005.86, 27,008.70 and 9,235.90 is: 13,853.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.86 : 27,008.70 = 9,235.90 : x
  2. Step 2: Convert to fraction form
    18,005.86/27,008.70 = 9,235.90/x
  3. Step 3: Cross multiply
    18,005.86x = 27,008.70 × 9,235.90
  4. Step 4: Simplify right side
    18,005.86x = 249,449,652.33
  5. Step 5: Solve for x
    x = 249,449,652.33/18,005.86
  6. Step 6: Final answer
    x = 13,853.80

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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.