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Finding the Fourth Proportional to 18,007.68, 24,842.88 and 11,720.64

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Solution

The fourth proportional to 18,007.68, 24,842.88 and 11,720.64 is: 16,169.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.68 : 24,842.88 = 11,720.64 : x
  2. Step 2: Convert to fraction form
    18,007.68/24,842.88 = 11,720.64/x
  3. Step 3: Cross multiply
    18,007.68x = 24,842.88 × 11,720.64
  4. Step 4: Simplify right side
    18,007.68x = 291,174,453.04
  5. Step 5: Solve for x
    x = 291,174,453.04/18,007.68
  6. Step 6: Final answer
    x = 16,169.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.