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Finding the Fourth Proportional to 18,535.60, 27,800.70 and 5,386.60

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Solution

The fourth proportional to 18,535.60, 27,800.70 and 5,386.60 is: 8,079.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,535.60 : 27,800.70 = 5,386.60 : x
  2. Step 2: Convert to fraction form
    18,535.60/27,800.70 = 5,386.60/x
  3. Step 3: Cross multiply
    18,535.60x = 27,800.70 × 5,386.60
  4. Step 4: Simplify right side
    18,535.60x = 149,751,250.62
  5. Step 5: Solve for x
    x = 149,751,250.62/18,535.60
  6. Step 6: Final answer
    x = 8,079.12

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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.