Home / 20,078.28-30,119.16-5,287.08

Finding the Fourth Proportional to 20,078.28, 30,119.16 and 5,287.08

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Solution

The fourth proportional to 20,078.28, 30,119.16 and 5,287.08 is: 7,931.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.28 : 30,119.16 = 5,287.08 : x
  2. Step 2: Convert to fraction form
    20,078.28/30,119.16 = 5,287.08/x
  3. Step 3: Cross multiply
    20,078.28x = 30,119.16 × 5,287.08
  4. Step 4: Simplify right side
    20,078.28x = 159,242,408.45
  5. Step 5: Solve for x
    x = 159,242,408.45/20,078.28
  6. Step 6: Final answer
    x = 7,931.08

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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.