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Finding the Fourth Proportional to 18,666.36, 27,990.36 and 11,655.72

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Solution

The fourth proportional to 18,666.36, 27,990.36 and 11,655.72 is: 17,477.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.36 : 27,990.36 = 11,655.72 : x
  2. Step 2: Convert to fraction form
    18,666.36/27,990.36 = 11,655.72/x
  3. Step 3: Cross multiply
    18,666.36x = 27,990.36 × 11,655.72
  4. Step 4: Simplify right side
    18,666.36x = 326,247,798.86
  5. Step 5: Solve for x
    x = 326,247,798.86/18,666.36
  6. Step 6: Final answer
    x = 17,477.85

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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.