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Finding the Fourth Proportional to 9,891.50, 13,655.07 and 6,360.71

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Solution

The fourth proportional to 9,891.50, 13,655.07 and 6,360.71 is: 8,780.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.50 : 13,655.07 = 6,360.71 : x
  2. Step 2: Convert to fraction form
    9,891.50/13,655.07 = 6,360.71/x
  3. Step 3: Cross multiply
    9,891.50x = 13,655.07 × 6,360.71
  4. Step 4: Simplify right side
    9,891.50x = 86,855,872.02
  5. Step 5: Solve for x
    x = 86,855,872.02/9,891.50
  6. Step 6: Final answer
    x = 8,780.86

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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.