Home / 20,278.28-30,419.22-7,130.76

Finding the Fourth Proportional to 20,278.28, 30,419.22 and 7,130.76

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Solution

The fourth proportional to 20,278.28, 30,419.22 and 7,130.76 is: 10,696.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.28 : 30,419.22 = 7,130.76 : x
  2. Step 2: Convert to fraction form
    20,278.28/30,419.22 = 7,130.76/x
  3. Step 3: Cross multiply
    20,278.28x = 30,419.22 × 7,130.76
  4. Step 4: Simplify right side
    20,278.28x = 216,912,157.21
  5. Step 5: Solve for x
    x = 216,912,157.21/20,278.28
  6. Step 6: Final answer
    x = 10,696.77

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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.