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Finding the Fourth Proportional to 18,842.15, 28,263.81 and 9,477.05

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Solution

The fourth proportional to 18,842.15, 28,263.81 and 9,477.05 is: 14,215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.15 : 28,263.81 = 9,477.05 : x
  2. Step 2: Convert to fraction form
    18,842.15/28,263.81 = 9,477.05/x
  3. Step 3: Cross multiply
    18,842.15x = 28,263.81 × 9,477.05
  4. Step 4: Simplify right side
    18,842.15x = 267,857,399.24
  5. Step 5: Solve for x
    x = 267,857,399.24/18,842.15
  6. Step 6: Final answer
    x = 14,215.87

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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.