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Finding the Fourth Proportional to 56,435.40, 84,620.70 and 16,986.60

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Solution

The fourth proportional to 56,435.40, 84,620.70 and 16,986.60 is: 25,470.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,435.40 : 84,620.70 = 16,986.60 : x
  2. Step 2: Convert to fraction form
    56,435.40/84,620.70 = 16,986.60/x
  3. Step 3: Cross multiply
    56,435.40x = 84,620.70 × 16,986.60
  4. Step 4: Simplify right side
    56,435.40x = 1,437,417,982.62
  5. Step 5: Solve for x
    x = 1,437,417,982.62/56,435.40
  6. Step 6: Final answer
    x = 25,470.15

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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.