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Finding the Fourth Proportional to 18,890.78, 28,324.02 and 9,029.84

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Solution

The fourth proportional to 18,890.78, 28,324.02 and 9,029.84 is: 13,538.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.78 : 28,324.02 = 9,029.84 : x
  2. Step 2: Convert to fraction form
    18,890.78/28,324.02 = 9,029.84/x
  3. Step 3: Cross multiply
    18,890.78x = 28,324.02 × 9,029.84
  4. Step 4: Simplify right side
    18,890.78x = 255,761,368.76
  5. Step 5: Solve for x
    x = 255,761,368.76/18,890.78
  6. Step 6: Final answer
    x = 13,538.95

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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.