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Finding the Fourth Proportional to 19,005.78, 28,500.36 and 7,310.76

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Solution

The fourth proportional to 19,005.78, 28,500.36 and 7,310.76 is: 10,962.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.78 : 28,500.36 = 7,310.76 : x
  2. Step 2: Convert to fraction form
    19,005.78/28,500.36 = 7,310.76/x
  3. Step 3: Cross multiply
    19,005.78x = 28,500.36 × 7,310.76
  4. Step 4: Simplify right side
    19,005.78x = 208,359,291.87
  5. Step 5: Solve for x
    x = 208,359,291.87/19,005.78
  6. Step 6: Final answer
    x = 10,962.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.