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Finding the Fourth Proportional to 13,470.91, 18,590.42 and 7,502.57

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Solution

The fourth proportional to 13,470.91, 18,590.42 and 7,502.57 is: 10,353.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.91 : 18,590.42 = 7,502.57 : x
  2. Step 2: Convert to fraction form
    13,470.91/18,590.42 = 7,502.57/x
  3. Step 3: Cross multiply
    13,470.91x = 18,590.42 × 7,502.57
  4. Step 4: Simplify right side
    13,470.91x = 139,475,992.61
  5. Step 5: Solve for x
    x = 139,475,992.61/13,470.91
  6. Step 6: Final answer
    x = 10,353.87

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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.