Home / 20,271.24-30,391.20-12,860.28

Finding the Fourth Proportional to 20,271.24, 30,391.20 and 12,860.28

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Solution

The fourth proportional to 20,271.24, 30,391.20 and 12,860.28 is: 19,280.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.24 : 30,391.20 = 12,860.28 : x
  2. Step 2: Convert to fraction form
    20,271.24/30,391.20 = 12,860.28/x
  3. Step 3: Cross multiply
    20,271.24x = 30,391.20 × 12,860.28
  4. Step 4: Simplify right side
    20,271.24x = 390,839,341.54
  5. Step 5: Solve for x
    x = 390,839,341.54/20,271.24
  6. Step 6: Final answer
    x = 19,280.49

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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.