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Finding the Fourth Proportional to 19,458.88, 27,038.56 and 19,211.20

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Solution

The fourth proportional to 19,458.88, 27,038.56 and 19,211.20 is: 26,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,458.88 : 27,038.56 = 19,211.20 : x
  2. Step 2: Convert to fraction form
    19,458.88/27,038.56 = 19,211.20/x
  3. Step 3: Cross multiply
    19,458.88x = 27,038.56 × 19,211.20
  4. Step 4: Simplify right side
    19,458.88x = 519,443,183.87
  5. Step 5: Solve for x
    x = 519,443,183.87/19,458.88
  6. Step 6: Final answer
    x = 26,694.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.