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Finding the Fourth Proportional to 18,210, 27,289.48 and 12,655.04

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Solution

The fourth proportional to 18,210, 27,289.48 and 12,655.04 is: 18,964.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,210 : 27,289.48 = 12,655.04 : x
  2. Step 2: Convert to fraction form
    18,210/27,289.48 = 12,655.04/x
  3. Step 3: Cross multiply
    18,210x = 27,289.48 × 12,655.04
  4. Step 4: Simplify right side
    18,210x = 345,349,460.98
  5. Step 5: Solve for x
    x = 345,349,460.98/18,210
  6. Step 6: Final answer
    x = 18,964.82

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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.