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Finding the Fourth Proportional to 6,389.65, 9,528.05 and 5,612.83

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Solution

The fourth proportional to 6,389.65, 9,528.05 and 5,612.83 is: 8,369.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.65 : 9,528.05 = 5,612.83 : x
  2. Step 2: Convert to fraction form
    6,389.65/9,528.05 = 5,612.83/x
  3. Step 3: Cross multiply
    6,389.65x = 9,528.05 × 5,612.83
  4. Step 4: Simplify right side
    6,389.65x = 53,479,324.88
  5. Step 5: Solve for x
    x = 53,479,324.88/6,389.65
  6. Step 6: Final answer
    x = 8,369.68

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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.