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Finding the Fourth Proportional to 13,765.83, 18,999.86 and 9,050.55

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Solution

The fourth proportional to 13,765.83, 18,999.86 and 9,050.55 is: 12,491.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,765.83 : 18,999.86 = 9,050.55 : x
  2. Step 2: Convert to fraction form
    13,765.83/18,999.86 = 9,050.55/x
  3. Step 3: Cross multiply
    13,765.83x = 18,999.86 × 9,050.55
  4. Step 4: Simplify right side
    13,765.83x = 171,959,110.55
  5. Step 5: Solve for x
    x = 171,959,110.55/13,765.83
  6. Step 6: Final answer
    x = 12,491.74

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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.