Home / 20,021.79-30,030.63-5,228.78

Finding the Fourth Proportional to 20,021.79, 30,030.63 and 5,228.78

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Solution

The fourth proportional to 20,021.79, 30,030.63 and 5,228.78 is: 7,842.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,021.79 : 30,030.63 = 5,228.78 : x
  2. Step 2: Convert to fraction form
    20,021.79/30,030.63 = 5,228.78/x
  3. Step 3: Cross multiply
    20,021.79x = 30,030.63 × 5,228.78
  4. Step 4: Simplify right side
    20,021.79x = 157,023,500.39
  5. Step 5: Solve for x
    x = 157,023,500.39/20,021.79
  6. Step 6: Final answer
    x = 7,842.63

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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.