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Finding the Fourth Proportional to 13,663.42, 18,863.71 and 8,955.90

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Solution

The fourth proportional to 13,663.42, 18,863.71 and 8,955.90 is: 12,364.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.42 : 18,863.71 = 8,955.90 : x
  2. Step 2: Convert to fraction form
    13,663.42/18,863.71 = 8,955.90/x
  3. Step 3: Cross multiply
    13,663.42x = 18,863.71 × 8,955.90
  4. Step 4: Simplify right side
    13,663.42x = 168,941,478.00
  5. Step 5: Solve for x
    x = 168,941,478.00/13,663.42
  6. Step 6: Final answer
    x = 12,364.51

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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.