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Finding the Fourth Proportional to 18,007.40, 27,011.10 and 16,986.80

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Solution

The fourth proportional to 18,007.40, 27,011.10 and 16,986.80 is: 25,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.40 : 27,011.10 = 16,986.80 : x
  2. Step 2: Convert to fraction form
    18,007.40/27,011.10 = 16,986.80/x
  3. Step 3: Cross multiply
    18,007.40x = 27,011.10 × 16,986.80
  4. Step 4: Simplify right side
    18,007.40x = 458,832,153.48
  5. Step 5: Solve for x
    x = 458,832,153.48/18,007.40
  6. Step 6: Final answer
    x = 25,480.20

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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.