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Finding the Fourth Proportional to 19,368.88, 26,728.56 and 11,411.44

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Solution

The fourth proportional to 19,368.88, 26,728.56 and 11,411.44 is: 15,747.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,368.88 : 26,728.56 = 11,411.44 : x
  2. Step 2: Convert to fraction form
    19,368.88/26,728.56 = 11,411.44/x
  3. Step 3: Cross multiply
    19,368.88x = 26,728.56 × 11,411.44
  4. Step 4: Simplify right side
    19,368.88x = 305,011,358.73
  5. Step 5: Solve for x
    x = 305,011,358.73/19,368.88
  6. Step 6: Final answer
    x = 15,747.50

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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.