Home / 13,417.40-20,106.90-9,879.80

Finding the Fourth Proportional to 13,417.40, 20,106.90 and 9,879.80

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Solution

The fourth proportional to 13,417.40, 20,106.90 and 9,879.80 is: 14,805.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,417.40 : 20,106.90 = 9,879.80 : x
  2. Step 2: Convert to fraction form
    13,417.40/20,106.90 = 9,879.80/x
  3. Step 3: Cross multiply
    13,417.40x = 20,106.90 × 9,879.80
  4. Step 4: Simplify right side
    13,417.40x = 198,652,150.62
  5. Step 5: Solve for x
    x = 198,652,150.62/13,417.40
  6. Step 6: Final answer
    x = 14,805.56

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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.