Home / 20,175.60-30,263.40-12,739.80

Finding the Fourth Proportional to 20,175.60, 30,263.40 and 12,739.80

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Solution

The fourth proportional to 20,175.60, 30,263.40 and 12,739.80 is: 19,109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,175.60 : 30,263.40 = 12,739.80 : x
  2. Step 2: Convert to fraction form
    20,175.60/30,263.40 = 12,739.80/x
  3. Step 3: Cross multiply
    20,175.60x = 30,263.40 × 12,739.80
  4. Step 4: Simplify right side
    20,175.60x = 385,549,663.32
  5. Step 5: Solve for x
    x = 385,549,663.32/20,175.60
  6. Step 6: Final answer
    x = 19,109.70

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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.