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Finding the Fourth Proportional to 13,389, 18,476.82 and 9,199.68

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Solution

The fourth proportional to 13,389, 18,476.82 and 9,199.68 is: 12,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389 : 18,476.82 = 9,199.68 : x
  2. Step 2: Convert to fraction form
    13,389/18,476.82 = 9,199.68/x
  3. Step 3: Cross multiply
    13,389x = 18,476.82 × 9,199.68
  4. Step 4: Simplify right side
    13,389x = 169,980,831.42
  5. Step 5: Solve for x
    x = 169,980,831.42/13,389
  6. Step 6: Final answer
    x = 12,695.56

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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.