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Finding the Fourth Proportional to 9,018.90, 12,447.54 and 6,890.94

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Solution

The fourth proportional to 9,018.90, 12,447.54 and 6,890.94 is: 9,510.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,018.90 : 12,447.54 = 6,890.94 : x
  2. Step 2: Convert to fraction form
    9,018.90/12,447.54 = 6,890.94/x
  3. Step 3: Cross multiply
    9,018.90x = 12,447.54 × 6,890.94
  4. Step 4: Simplify right side
    9,018.90x = 85,775,251.29
  5. Step 5: Solve for x
    x = 85,775,251.29/9,018.90
  6. Step 6: Final answer
    x = 9,510.61

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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.