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Finding the Fourth Proportional to 19,772.39, 27,285.89 and 10,819.89

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Solution

The fourth proportional to 19,772.39, 27,285.89 and 10,819.89 is: 14,931.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,772.39 : 27,285.89 = 10,819.89 : x
  2. Step 2: Convert to fraction form
    19,772.39/27,285.89 = 10,819.89/x
  3. Step 3: Cross multiply
    19,772.39x = 27,285.89 × 10,819.89
  4. Step 4: Simplify right side
    19,772.39x = 295,230,280.72
  5. Step 5: Solve for x
    x = 295,230,280.72/19,772.39
  6. Step 6: Final answer
    x = 14,931.45

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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.