Home / 20,135.40-30,178.80-10,269.60

Finding the Fourth Proportional to 20,135.40, 30,178.80 and 10,269.60

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Solution

The fourth proportional to 20,135.40, 30,178.80 and 10,269.60 is: 15,392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.40 : 30,178.80 = 10,269.60 : x
  2. Step 2: Convert to fraction form
    20,135.40/30,178.80 = 10,269.60/x
  3. Step 3: Cross multiply
    20,135.40x = 30,178.80 × 10,269.60
  4. Step 4: Simplify right side
    20,135.40x = 309,924,204.48
  5. Step 5: Solve for x
    x = 309,924,204.48/20,135.40
  6. Step 6: Final answer
    x = 15,392.01

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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.