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Finding the Fourth Proportional to 18,011.16, 26,980.52 and 8,978.02

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Solution

The fourth proportional to 18,011.16, 26,980.52 and 8,978.02 is: 13,448.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,011.16 : 26,980.52 = 8,978.02 : x
  2. Step 2: Convert to fraction form
    18,011.16/26,980.52 = 8,978.02/x
  3. Step 3: Cross multiply
    18,011.16x = 26,980.52 × 8,978.02
  4. Step 4: Simplify right side
    18,011.16x = 242,231,535.83
  5. Step 5: Solve for x
    x = 242,231,535.83/18,011.16
  6. Step 6: Final answer
    x = 13,448.97

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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.