Home / 13,427.80-20,120.10-8,488.60

Finding the Fourth Proportional to 13,427.80, 20,120.10 and 8,488.60

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Solution

The fourth proportional to 13,427.80, 20,120.10 and 8,488.60 is: 12,719.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.80 : 20,120.10 = 8,488.60 : x
  2. Step 2: Convert to fraction form
    13,427.80/20,120.10 = 8,488.60/x
  3. Step 3: Cross multiply
    13,427.80x = 20,120.10 × 8,488.60
  4. Step 4: Simplify right side
    13,427.80x = 170,791,480.86
  5. Step 5: Solve for x
    x = 170,791,480.86/13,427.80
  6. Step 6: Final answer
    x = 12,719.25

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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.