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Finding the Fourth Proportional to 9,890.91, 14,812.94 and 8,585.29

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Solution

The fourth proportional to 9,890.91, 14,812.94 and 8,585.29 is: 12,857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,890.91 : 14,812.94 = 8,585.29 : x
  2. Step 2: Convert to fraction form
    9,890.91/14,812.94 = 8,585.29/x
  3. Step 3: Cross multiply
    9,890.91x = 14,812.94 × 8,585.29
  4. Step 4: Simplify right side
    9,890.91x = 127,173,425.63
  5. Step 5: Solve for x
    x = 127,173,425.63/9,890.91
  6. Step 6: Final answer
    x = 12,857.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.