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Finding the Fourth Proportional to 18,962.56, 28,451.22 and 7,866.46

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Solution

The fourth proportional to 18,962.56, 28,451.22 and 7,866.46 is: 11,802.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.56 : 28,451.22 = 7,866.46 : x
  2. Step 2: Convert to fraction form
    18,962.56/28,451.22 = 7,866.46/x
  3. Step 3: Cross multiply
    18,962.56x = 28,451.22 × 7,866.46
  4. Step 4: Simplify right side
    18,962.56x = 223,810,384.08
  5. Step 5: Solve for x
    x = 223,810,384.08/18,962.56
  6. Step 6: Final answer
    x = 11,802.75

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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.