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Finding the Fourth Proportional to 6,391.65, 9,536.14 and 5,689.99

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Solution

The fourth proportional to 6,391.65, 9,536.14 and 5,689.99 is: 8,489.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.65 : 9,536.14 = 5,689.99 : x
  2. Step 2: Convert to fraction form
    6,391.65/9,536.14 = 5,689.99/x
  3. Step 3: Cross multiply
    6,391.65x = 9,536.14 × 5,689.99
  4. Step 4: Simplify right side
    6,391.65x = 54,260,503.17
  5. Step 5: Solve for x
    x = 54,260,503.17/6,391.65
  6. Step 6: Final answer
    x = 8,489.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.