Home / 20,300.24-30,428.12-10,440.04

Finding the Fourth Proportional to 20,300.24, 30,428.12 and 10,440.04

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Solution

The fourth proportional to 20,300.24, 30,428.12 and 10,440.04 is: 15,648.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.24 : 30,428.12 = 10,440.04 : x
  2. Step 2: Convert to fraction form
    20,300.24/30,428.12 = 10,440.04/x
  3. Step 3: Cross multiply
    20,300.24x = 30,428.12 × 10,440.04
  4. Step 4: Simplify right side
    20,300.24x = 317,670,789.92
  5. Step 5: Solve for x
    x = 317,670,789.92/20,300.24
  6. Step 6: Final answer
    x = 15,648.62

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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.