Home / 13,731.79-18,942.55-8,355.86

Finding the Fourth Proportional to 13,731.79, 18,942.55 and 8,355.86

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Solution

The fourth proportional to 13,731.79, 18,942.55 and 8,355.86 is: 11,526.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.79 : 18,942.55 = 8,355.86 : x
  2. Step 2: Convert to fraction form
    13,731.79/18,942.55 = 8,355.86/x
  3. Step 3: Cross multiply
    13,731.79x = 18,942.55 × 8,355.86
  4. Step 4: Simplify right side
    13,731.79x = 158,281,295.84
  5. Step 5: Solve for x
    x = 158,281,295.84/13,731.79
  6. Step 6: Final answer
    x = 11,526.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.