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Finding the Fourth Proportional to 18,878.16, 28,293.02 and 7,792.64

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Solution

The fourth proportional to 18,878.16, 28,293.02 and 7,792.64 is: 11,678.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.16 : 28,293.02 = 7,792.64 : x
  2. Step 2: Convert to fraction form
    18,878.16/28,293.02 = 7,792.64/x
  3. Step 3: Cross multiply
    18,878.16x = 28,293.02 × 7,792.64
  4. Step 4: Simplify right side
    18,878.16x = 220,477,319.37
  5. Step 5: Solve for x
    x = 220,477,319.37/18,878.16
  6. Step 6: Final answer
    x = 11,678.96

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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.