Home / 20,284.35-30,428.10-7,139.67

Finding the Fourth Proportional to 20,284.35, 30,428.10 and 7,139.67

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Solution

The fourth proportional to 20,284.35, 30,428.10 and 7,139.67 is: 10,710.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,284.35 : 30,428.10 = 7,139.67 : x
  2. Step 2: Convert to fraction form
    20,284.35/30,428.10 = 7,139.67/x
  3. Step 3: Cross multiply
    20,284.35x = 30,428.10 × 7,139.67
  4. Step 4: Simplify right side
    20,284.35x = 217,246,592.73
  5. Step 5: Solve for x
    x = 217,246,592.73/20,284.35
  6. Step 6: Final answer
    x = 10,710.06

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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.