Home / 20,379.60-28,139.40-14,110.20

Finding the Fourth Proportional to 20,379.60, 28,139.40 and 14,110.20

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Solution

The fourth proportional to 20,379.60, 28,139.40 and 14,110.20 is: 19,482.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.60 : 28,139.40 = 14,110.20 : x
  2. Step 2: Convert to fraction form
    20,379.60/28,139.40 = 14,110.20/x
  3. Step 3: Cross multiply
    20,379.60x = 28,139.40 × 14,110.20
  4. Step 4: Simplify right side
    20,379.60x = 397,052,561.88
  5. Step 5: Solve for x
    x = 397,052,561.88/20,379.60
  6. Step 6: Final answer
    x = 19,482.84

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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.