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Finding the Fourth Proportional to 19,788.25, 27,307.79 and 10,956.25

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Solution

The fourth proportional to 19,788.25, 27,307.79 and 10,956.25 is: 15,119.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,788.25 : 27,307.79 = 10,956.25 : x
  2. Step 2: Convert to fraction form
    19,788.25/27,307.79 = 10,956.25/x
  3. Step 3: Cross multiply
    19,788.25x = 27,307.79 × 10,956.25
  4. Step 4: Simplify right side
    19,788.25x = 299,190,919.41
  5. Step 5: Solve for x
    x = 299,190,919.41/19,788.25
  6. Step 6: Final answer
    x = 15,119.63

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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.