Home / 13,356.90-18,429.21-8,635.50

Finding the Fourth Proportional to 13,356.90, 18,429.21 and 8,635.50

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Solution

The fourth proportional to 13,356.90, 18,429.21 and 8,635.50 is: 11,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.90 : 18,429.21 = 8,635.50 : x
  2. Step 2: Convert to fraction form
    13,356.90/18,429.21 = 8,635.50/x
  3. Step 3: Cross multiply
    13,356.90x = 18,429.21 × 8,635.50
  4. Step 4: Simplify right side
    13,356.90x = 159,145,442.96
  5. Step 5: Solve for x
    x = 159,145,442.96/13,356.90
  6. Step 6: Final answer
    x = 11,914.85

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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.