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Finding the Fourth Proportional to 11,420.63, 15,761.07 and 6,943.65

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Solution

The fourth proportional to 11,420.63, 15,761.07 and 6,943.65 is: 9,582.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.63 : 15,761.07 = 6,943.65 : x
  2. Step 2: Convert to fraction form
    11,420.63/15,761.07 = 6,943.65/x
  3. Step 3: Cross multiply
    11,420.63x = 15,761.07 × 6,943.65
  4. Step 4: Simplify right side
    11,420.63x = 109,439,353.71
  5. Step 5: Solve for x
    x = 109,439,353.71/11,420.63
  6. Step 6: Final answer
    x = 9,582.61

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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.