Home / 14,520.12-21,771.36-7,115.40

Finding the Fourth Proportional to 14,520.12, 21,771.36 and 7,115.40

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Solution

The fourth proportional to 14,520.12, 21,771.36 and 7,115.40 is: 10,668.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,520.12 : 21,771.36 = 7,115.40 : x
  2. Step 2: Convert to fraction form
    14,520.12/21,771.36 = 7,115.40/x
  3. Step 3: Cross multiply
    14,520.12x = 21,771.36 × 7,115.40
  4. Step 4: Simplify right side
    14,520.12x = 154,911,934.94
  5. Step 5: Solve for x
    x = 154,911,934.94/14,520.12
  6. Step 6: Final answer
    x = 10,668.78

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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.