Home / 20,189.40-30,284.10-12,802.20

Finding the Fourth Proportional to 20,189.40, 30,284.10 and 12,802.20

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Solution

The fourth proportional to 20,189.40, 30,284.10 and 12,802.20 is: 19,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.40 : 30,284.10 = 12,802.20 : x
  2. Step 2: Convert to fraction form
    20,189.40/30,284.10 = 12,802.20/x
  3. Step 3: Cross multiply
    20,189.40x = 30,284.10 × 12,802.20
  4. Step 4: Simplify right side
    20,189.40x = 387,703,105.02
  5. Step 5: Solve for x
    x = 387,703,105.02/20,189.40
  6. Step 6: Final answer
    x = 19,203.30

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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.