Home / 20,276.28-30,416.22-7,128.76

Finding the Fourth Proportional to 20,276.28, 30,416.22 and 7,128.76

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Solution

The fourth proportional to 20,276.28, 30,416.22 and 7,128.76 is: 10,693.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.28 : 30,416.22 = 7,128.76 : x
  2. Step 2: Convert to fraction form
    20,276.28/30,416.22 = 7,128.76/x
  3. Step 3: Cross multiply
    20,276.28x = 30,416.22 × 7,128.76
  4. Step 4: Simplify right side
    20,276.28x = 216,829,932.49
  5. Step 5: Solve for x
    x = 216,829,932.49/20,276.28
  6. Step 6: Final answer
    x = 10,693.77

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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.