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Finding the Fourth Proportional to 8,555.71, 11,721.13 and 8,235.90

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Solution

The fourth proportional to 8,555.71, 11,721.13 and 8,235.90 is: 11,282.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555.71 : 11,721.13 = 8,235.90 : x
  2. Step 2: Convert to fraction form
    8,555.71/11,721.13 = 8,235.90/x
  3. Step 3: Cross multiply
    8,555.71x = 11,721.13 × 8,235.90
  4. Step 4: Simplify right side
    8,555.71x = 96,533,984.08
  5. Step 5: Solve for x
    x = 96,533,984.08/8,555.71
  6. Step 6: Final answer
    x = 11,282.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.