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Finding the Fourth Proportional to 12,699.63, 18,956.88 and 11,659.59

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Solution

The fourth proportional to 12,699.63, 18,956.88 and 11,659.59 is: 17,404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.63 : 18,956.88 = 11,659.59 : x
  2. Step 2: Convert to fraction form
    12,699.63/18,956.88 = 11,659.59/x
  3. Step 3: Cross multiply
    12,699.63x = 18,956.88 × 11,659.59
  4. Step 4: Simplify right side
    12,699.63x = 221,029,448.48
  5. Step 5: Solve for x
    x = 221,029,448.48/12,699.63
  6. Step 6: Final answer
    x = 17,404.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.