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Finding the Fourth Proportional to 18,320.40, 27,480.60 and 18,205.20

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Solution

The fourth proportional to 18,320.40, 27,480.60 and 18,205.20 is: 27,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,320.40 : 27,480.60 = 18,205.20 : x
  2. Step 2: Convert to fraction form
    18,320.40/27,480.60 = 18,205.20/x
  3. Step 3: Cross multiply
    18,320.40x = 27,480.60 × 18,205.20
  4. Step 4: Simplify right side
    18,320.40x = 500,289,819.12
  5. Step 5: Solve for x
    x = 500,289,819.12/18,320.40
  6. Step 6: Final answer
    x = 27,307.80

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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.