Home / 20,142.49-30,216.81-10,276.39

Finding the Fourth Proportional to 20,142.49, 30,216.81 and 10,276.39

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Solution

The fourth proportional to 20,142.49, 30,216.81 and 10,276.39 is: 15,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.49 : 30,216.81 = 10,276.39 : x
  2. Step 2: Convert to fraction form
    20,142.49/30,216.81 = 10,276.39/x
  3. Step 3: Cross multiply
    20,142.49x = 30,216.81 × 10,276.39
  4. Step 4: Simplify right side
    20,142.49x = 310,519,724.12
  5. Step 5: Solve for x
    x = 310,519,724.12/20,142.49
  6. Step 6: Final answer
    x = 15,416.15

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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.