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Finding the Fourth Proportional to 18,972, 26,182.08 and 11,520

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Solution

The fourth proportional to 18,972, 26,182.08 and 11,520 is: 15,898.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972 : 26,182.08 = 11,520 : x
  2. Step 2: Convert to fraction form
    18,972/26,182.08 = 11,520/x
  3. Step 3: Cross multiply
    18,972x = 26,182.08 × 11,520
  4. Step 4: Simplify right side
    18,972x = 301,617,561.60
  5. Step 5: Solve for x
    x = 301,617,561.60/18,972
  6. Step 6: Final answer
    x = 15,898.04

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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.