Home / 20,078.14-30,114.64-5,288.20

Finding the Fourth Proportional to 20,078.14, 30,114.64 and 5,288.20

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Solution

The fourth proportional to 20,078.14, 30,114.64 and 5,288.20 is: 7,931.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.14 : 30,114.64 = 5,288.20 : x
  2. Step 2: Convert to fraction form
    20,078.14/30,114.64 = 5,288.20/x
  3. Step 3: Cross multiply
    20,078.14x = 30,114.64 × 5,288.20
  4. Step 4: Simplify right side
    20,078.14x = 159,252,239.25
  5. Step 5: Solve for x
    x = 159,252,239.25/20,078.14
  6. Step 6: Final answer
    x = 7,931.62

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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.