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Finding the Fourth Proportional to 8,620.56, 11,891.88 and 6,521.04

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Solution

The fourth proportional to 8,620.56, 11,891.88 and 6,521.04 is: 8,995.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.56 : 11,891.88 = 6,521.04 : x
  2. Step 2: Convert to fraction form
    8,620.56/11,891.88 = 6,521.04/x
  3. Step 3: Cross multiply
    8,620.56x = 11,891.88 × 6,521.04
  4. Step 4: Simplify right side
    8,620.56x = 77,547,425.16
  5. Step 5: Solve for x
    x = 77,547,425.16/8,620.56
  6. Step 6: Final answer
    x = 8,995.64

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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.