Home / 20,005.12-30,004.26-8,315.20

Finding the Fourth Proportional to 20,005.12, 30,004.26 and 8,315.20

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Solution

The fourth proportional to 20,005.12, 30,004.26 and 8,315.20 is: 12,471.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.12 : 30,004.26 = 8,315.20 : x
  2. Step 2: Convert to fraction form
    20,005.12/30,004.26 = 8,315.20/x
  3. Step 3: Cross multiply
    20,005.12x = 30,004.26 × 8,315.20
  4. Step 4: Simplify right side
    20,005.12x = 249,491,422.75
  5. Step 5: Solve for x
    x = 249,491,422.75/20,005.12
  6. Step 6: Final answer
    x = 12,471.38

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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.