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Finding the Fourth Proportional to 18,882.81, 28,327.62 and 7,783.32

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Solution

The fourth proportional to 18,882.81, 28,327.62 and 7,783.32 is: 11,676.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,882.81 : 28,327.62 = 7,783.32 : x
  2. Step 2: Convert to fraction form
    18,882.81/28,327.62 = 7,783.32/x
  3. Step 3: Cross multiply
    18,882.81x = 28,327.62 × 7,783.32
  4. Step 4: Simplify right side
    18,882.81x = 220,482,931.30
  5. Step 5: Solve for x
    x = 220,482,931.30/18,882.81
  6. Step 6: Final answer
    x = 11,676.38

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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.