Home / 20,719.40-28,592.82-11,287.76

Finding the Fourth Proportional to 20,719.40, 28,592.82 and 11,287.76

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Solution

The fourth proportional to 20,719.40, 28,592.82 and 11,287.76 is: 15,577.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.40 : 28,592.82 = 11,287.76 : x
  2. Step 2: Convert to fraction form
    20,719.40/28,592.82 = 11,287.76/x
  3. Step 3: Cross multiply
    20,719.40x = 28,592.82 × 11,287.76
  4. Step 4: Simplify right side
    20,719.40x = 322,748,889.88
  5. Step 5: Solve for x
    x = 322,748,889.88/20,719.40
  6. Step 6: Final answer
    x = 15,577.13

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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.