Home / 9,987.24-13,780.58-6,211.40

Finding the Fourth Proportional to 9,987.24, 13,780.58 and 6,211.40

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Solution

The fourth proportional to 9,987.24, 13,780.58 and 6,211.40 is: 8,570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.24 : 13,780.58 = 6,211.40 : x
  2. Step 2: Convert to fraction form
    9,987.24/13,780.58 = 6,211.40/x
  3. Step 3: Cross multiply
    9,987.24x = 13,780.58 × 6,211.40
  4. Step 4: Simplify right side
    9,987.24x = 85,596,694.61
  5. Step 5: Solve for x
    x = 85,596,694.61/9,987.24
  6. Step 6: Final answer
    x = 8,570.61

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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.