Home / 13,518.98-20,280.39-4,159.78

Finding the Fourth Proportional to 13,518.98, 20,280.39 and 4,159.78

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Solution

The fourth proportional to 13,518.98, 20,280.39 and 4,159.78 is: 6,240.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.98 : 20,280.39 = 4,159.78 : x
  2. Step 2: Convert to fraction form
    13,518.98/20,280.39 = 4,159.78/x
  3. Step 3: Cross multiply
    13,518.98x = 20,280.39 × 4,159.78
  4. Step 4: Simplify right side
    13,518.98x = 84,361,960.71
  5. Step 5: Solve for x
    x = 84,361,960.71/13,518.98
  6. Step 6: Final answer
    x = 6,240.26

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1.5x scale

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.