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Finding the Fourth Proportional to 17,666.76, 26,442.44 and 12,985.54

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Solution

The fourth proportional to 17,666.76, 26,442.44 and 12,985.54 is: 19,435.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,666.76 : 26,442.44 = 12,985.54 : x
  2. Step 2: Convert to fraction form
    17,666.76/26,442.44 = 12,985.54/x
  3. Step 3: Cross multiply
    17,666.76x = 26,442.44 × 12,985.54
  4. Step 4: Simplify right side
    17,666.76x = 343,369,362.32
  5. Step 5: Solve for x
    x = 343,369,362.32/17,666.76
  6. Step 6: Final answer
    x = 19,435.90

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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.