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Finding the Fourth Proportional to 13,453.92, 18,565.92 and 7,864.80

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Solution

The fourth proportional to 13,453.92, 18,565.92 and 7,864.80 is: 10,853.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,453.92 : 18,565.92 = 7,864.80 : x
  2. Step 2: Convert to fraction form
    13,453.92/18,565.92 = 7,864.80/x
  3. Step 3: Cross multiply
    13,453.92x = 18,565.92 × 7,864.80
  4. Step 4: Simplify right side
    13,453.92x = 146,017,247.62
  5. Step 5: Solve for x
    x = 146,017,247.62/13,453.92
  6. Step 6: Final answer
    x = 10,853.14

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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.