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Finding the Fourth Proportional to 13,818.16, 19,062.90 and 8,509.84

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Solution

The fourth proportional to 13,818.16, 19,062.90 and 8,509.84 is: 11,739.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.16 : 19,062.90 = 8,509.84 : x
  2. Step 2: Convert to fraction form
    13,818.16/19,062.90 = 8,509.84/x
  3. Step 3: Cross multiply
    13,818.16x = 19,062.90 × 8,509.84
  4. Step 4: Simplify right side
    13,818.16x = 162,222,228.94
  5. Step 5: Solve for x
    x = 162,222,228.94/13,818.16
  6. Step 6: Final answer
    x = 11,739.79

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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.