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Finding the Fourth Proportional to 19,107.70, 28,673.70 and 11,210.20

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Solution

The fourth proportional to 19,107.70, 28,673.70 and 11,210.20 is: 16,822.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,107.70 : 28,673.70 = 11,210.20 : x
  2. Step 2: Convert to fraction form
    19,107.70/28,673.70 = 11,210.20/x
  3. Step 3: Cross multiply
    19,107.70x = 28,673.70 × 11,210.20
  4. Step 4: Simplify right side
    19,107.70x = 321,437,911.74
  5. Step 5: Solve for x
    x = 321,437,911.74/19,107.70
  6. Step 6: Final answer
    x = 16,822.43

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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.