Home / 13,628.40-20,423.40-10,090.80

Finding the Fourth Proportional to 13,628.40, 20,423.40 and 10,090.80

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Solution

The fourth proportional to 13,628.40, 20,423.40 and 10,090.80 is: 15,121.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.40 : 20,423.40 = 10,090.80 : x
  2. Step 2: Convert to fraction form
    13,628.40/20,423.40 = 10,090.80/x
  3. Step 3: Cross multiply
    13,628.40x = 20,423.40 × 10,090.80
  4. Step 4: Simplify right side
    13,628.40x = 206,088,444.72
  5. Step 5: Solve for x
    x = 206,088,444.72/13,628.40
  6. Step 6: Final answer
    x = 15,121.98

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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.