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Finding the Fourth Proportional to 18,809.40, 28,133.10 and 16,849.20

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Solution

The fourth proportional to 18,809.40, 28,133.10 and 16,849.20 is: 25,201.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.40 : 28,133.10 = 16,849.20 : x
  2. Step 2: Convert to fraction form
    18,809.40/28,133.10 = 16,849.20/x
  3. Step 3: Cross multiply
    18,809.40x = 28,133.10 × 16,849.20
  4. Step 4: Simplify right side
    18,809.40x = 474,020,228.52
  5. Step 5: Solve for x
    x = 474,020,228.52/18,809.40
  6. Step 6: Final answer
    x = 25,201.24

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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.