Home / 18,747.30-28,130.10-8,215.86

Finding the Fourth Proportional to 18,747.30, 28,130.10 and 8,215.86

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Solution

The fourth proportional to 18,747.30, 28,130.10 and 8,215.86 is: 12,327.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.30 : 28,130.10 = 8,215.86 : x
  2. Step 2: Convert to fraction form
    18,747.30/28,130.10 = 8,215.86/x
  3. Step 3: Cross multiply
    18,747.30x = 28,130.10 × 8,215.86
  4. Step 4: Simplify right side
    18,747.30x = 231,112,963.39
  5. Step 5: Solve for x
    x = 231,112,963.39/18,747.30
  6. Step 6: Final answer
    x = 12,327.80

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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.