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Finding the Fourth Proportional to 13,089.66, 19,659.66 and 11,219.77

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Solution

The fourth proportional to 13,089.66, 19,659.66 and 11,219.77 is: 16,851.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.66 : 19,659.66 = 11,219.77 : x
  2. Step 2: Convert to fraction form
    13,089.66/19,659.66 = 11,219.77/x
  3. Step 3: Cross multiply
    13,089.66x = 19,659.66 × 11,219.77
  4. Step 4: Simplify right side
    13,089.66x = 220,576,863.48
  5. Step 5: Solve for x
    x = 220,576,863.48/13,089.66
  6. Step 6: Final answer
    x = 16,851.23

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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.