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Finding the Fourth Proportional to 19,371.35, 28,983.69 and 11,478.10

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Solution

The fourth proportional to 19,371.35, 28,983.69 and 11,478.10 is: 17,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,371.35 : 28,983.69 = 11,478.10 : x
  2. Step 2: Convert to fraction form
    19,371.35/28,983.69 = 11,478.10/x
  3. Step 3: Cross multiply
    19,371.35x = 28,983.69 × 11,478.10
  4. Step 4: Simplify right side
    19,371.35x = 332,677,692.19
  5. Step 5: Solve for x
    x = 332,677,692.19/19,371.35
  6. Step 6: Final answer
    x = 17,173.70

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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.