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Finding the Fourth Proportional to 18,710.60, 28,065.30 and 6,231.20

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Solution

The fourth proportional to 18,710.60, 28,065.30 and 6,231.20 is: 9,346.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.60 : 28,065.30 = 6,231.20 : x
  2. Step 2: Convert to fraction form
    18,710.60/28,065.30 = 6,231.20/x
  3. Step 3: Cross multiply
    18,710.60x = 28,065.30 × 6,231.20
  4. Step 4: Simplify right side
    18,710.60x = 174,880,497.36
  5. Step 5: Solve for x
    x = 174,880,497.36/18,710.60
  6. Step 6: Final answer
    x = 9,346.60

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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.