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Finding the Fourth Proportional to 18,986.40, 26,235.96 and 16,460.40

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Solution

The fourth proportional to 18,986.40, 26,235.96 and 16,460.40 is: 22,745.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.40 : 26,235.96 = 16,460.40 : x
  2. Step 2: Convert to fraction form
    18,986.40/26,235.96 = 16,460.40/x
  3. Step 3: Cross multiply
    18,986.40x = 26,235.96 × 16,460.40
  4. Step 4: Simplify right side
    18,986.40x = 431,854,395.98
  5. Step 5: Solve for x
    x = 431,854,395.98/18,986.40
  6. Step 6: Final answer
    x = 22,745.46

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1.5x scale

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.