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Finding the Fourth Proportional to 18,867.32, 28,304.04 and 6,388.10

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Solution

The fourth proportional to 18,867.32, 28,304.04 and 6,388.10 is: 9,583.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.32 : 28,304.04 = 6,388.10 : x
  2. Step 2: Convert to fraction form
    18,867.32/28,304.04 = 6,388.10/x
  3. Step 3: Cross multiply
    18,867.32x = 28,304.04 × 6,388.10
  4. Step 4: Simplify right side
    18,867.32x = 180,809,037.92
  5. Step 5: Solve for x
    x = 180,809,037.92/18,867.32
  6. Step 6: Final answer
    x = 9,583.19

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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.