Home / 15,090.88-20,819.70-11,121.46

Finding the Fourth Proportional to 15,090.88, 20,819.70 and 11,121.46

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Solution

The fourth proportional to 15,090.88, 20,819.70 and 11,121.46 is: 15,343.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.88 : 20,819.70 = 11,121.46 : x
  2. Step 2: Convert to fraction form
    15,090.88/20,819.70 = 11,121.46/x
  3. Step 3: Cross multiply
    15,090.88x = 20,819.70 × 11,121.46
  4. Step 4: Simplify right side
    15,090.88x = 231,545,460.76
  5. Step 5: Solve for x
    x = 231,545,460.76/15,090.88
  6. Step 6: Final answer
    x = 15,343.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.