Home / 13,380.84-18,470.21-8,280.27

Finding the Fourth Proportional to 13,380.84, 18,470.21 and 8,280.27

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Solution

The fourth proportional to 13,380.84, 18,470.21 and 8,280.27 is: 11,429.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.84 : 18,470.21 = 8,280.27 : x
  2. Step 2: Convert to fraction form
    13,380.84/18,470.21 = 8,280.27/x
  3. Step 3: Cross multiply
    13,380.84x = 18,470.21 × 8,280.27
  4. Step 4: Simplify right side
    13,380.84x = 152,938,284.36
  5. Step 5: Solve for x
    x = 152,938,284.36/13,380.84
  6. Step 6: Final answer
    x = 11,429.65

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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.