Home / 9,987.52-13,780.38-6,450.12

Finding the Fourth Proportional to 9,987.52, 13,780.38 and 6,450.12

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Solution

The fourth proportional to 9,987.52, 13,780.38 and 6,450.12 is: 8,899.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.52 : 13,780.38 = 6,450.12 : x
  2. Step 2: Convert to fraction form
    9,987.52/13,780.38 = 6,450.12/x
  3. Step 3: Cross multiply
    9,987.52x = 13,780.38 × 6,450.12
  4. Step 4: Simplify right side
    9,987.52x = 88,885,104.65
  5. Step 5: Solve for x
    x = 88,885,104.65/9,987.52
  6. Step 6: Final answer
    x = 8,899.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.