Home / 20,470.20-30,694.37-7,315.40

Finding the Fourth Proportional to 20,470.20, 30,694.37 and 7,315.40

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Solution

The fourth proportional to 20,470.20, 30,694.37 and 7,315.40 is: 10,969.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.20 : 30,694.37 = 7,315.40 : x
  2. Step 2: Convert to fraction form
    20,470.20/30,694.37 = 7,315.40/x
  3. Step 3: Cross multiply
    20,470.20x = 30,694.37 × 7,315.40
  4. Step 4: Simplify right side
    20,470.20x = 224,541,404.25
  5. Step 5: Solve for x
    x = 224,541,404.25/20,470.20
  6. Step 6: Final answer
    x = 10,969.18

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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.