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Finding the Fourth Proportional to 18,962.58, 28,437.72 and 7,863.30

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Solution

The fourth proportional to 18,962.58, 28,437.72 and 7,863.30 is: 11,792.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.58 : 28,437.72 = 7,863.30 : x
  2. Step 2: Convert to fraction form
    18,962.58/28,437.72 = 7,863.30/x
  3. Step 3: Cross multiply
    18,962.58x = 28,437.72 × 7,863.30
  4. Step 4: Simplify right side
    18,962.58x = 223,614,323.68
  5. Step 5: Solve for x
    x = 223,614,323.68/18,962.58
  6. Step 6: Final answer
    x = 11,792.40

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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.