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Finding the Fourth Proportional to 18,920.63, 26,113.92 and 10,963.64

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Solution

The fourth proportional to 18,920.63, 26,113.92 and 10,963.64 is: 15,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.63 : 26,113.92 = 10,963.64 : x
  2. Step 2: Convert to fraction form
    18,920.63/26,113.92 = 10,963.64/x
  3. Step 3: Cross multiply
    18,920.63x = 26,113.92 × 10,963.64
  4. Step 4: Simplify right side
    18,920.63x = 286,303,617.87
  5. Step 5: Solve for x
    x = 286,303,617.87/18,920.63
  6. Step 6: Final answer
    x = 15,131.82

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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.