Home / 20,145.40-30,228.90-8,459.80

Finding the Fourth Proportional to 20,145.40, 30,228.90 and 8,459.80

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Solution

The fourth proportional to 20,145.40, 30,228.90 and 8,459.80 is: 12,694.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.40 : 30,228.90 = 8,459.80 : x
  2. Step 2: Convert to fraction form
    20,145.40/30,228.90 = 8,459.80/x
  3. Step 3: Cross multiply
    20,145.40x = 30,228.90 × 8,459.80
  4. Step 4: Simplify right side
    20,145.40x = 255,730,448.22
  5. Step 5: Solve for x
    x = 255,730,448.22/20,145.40
  6. Step 6: Final answer
    x = 12,694.24

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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.