Home / 20,315.34-30,454.56-9,215.99

Finding the Fourth Proportional to 20,315.34, 30,454.56 and 9,215.99

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Solution

The fourth proportional to 20,315.34, 30,454.56 and 9,215.99 is: 13,815.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.34 : 30,454.56 = 9,215.99 : x
  2. Step 2: Convert to fraction form
    20,315.34/30,454.56 = 9,215.99/x
  3. Step 3: Cross multiply
    20,315.34x = 30,454.56 × 9,215.99
  4. Step 4: Simplify right side
    20,315.34x = 280,668,882.35
  5. Step 5: Solve for x
    x = 280,668,882.35/20,315.34
  6. Step 6: Final answer
    x = 13,815.61

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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.