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Finding the Fourth Proportional to 18,983.64, 26,209.74 and 16,990.74

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Solution

The fourth proportional to 18,983.64, 26,209.74 and 16,990.74 is: 23,458.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.64 : 26,209.74 = 16,990.74 : x
  2. Step 2: Convert to fraction form
    18,983.64/26,209.74 = 16,990.74/x
  3. Step 3: Cross multiply
    18,983.64x = 26,209.74 × 16,990.74
  4. Step 4: Simplify right side
    18,983.64x = 445,322,877.81
  5. Step 5: Solve for x
    x = 445,322,877.81/18,983.64
  6. Step 6: Final answer
    x = 23,458.24

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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.