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Finding the Fourth Proportional to 13,435.54, 18,539.65 and 8,400.31

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Solution

The fourth proportional to 13,435.54, 18,539.65 and 8,400.31 is: 11,591.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,435.54 : 18,539.65 = 8,400.31 : x
  2. Step 2: Convert to fraction form
    13,435.54/18,539.65 = 8,400.31/x
  3. Step 3: Cross multiply
    13,435.54x = 18,539.65 × 8,400.31
  4. Step 4: Simplify right side
    13,435.54x = 155,738,807.29
  5. Step 5: Solve for x
    x = 155,738,807.29/13,435.54
  6. Step 6: Final answer
    x = 11,591.56

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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.