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Finding the Fourth Proportional to 18,923.68, 26,101.20 and 12,955.60

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Solution

The fourth proportional to 18,923.68, 26,101.20 and 12,955.60 is: 17,869.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.68 : 26,101.20 = 12,955.60 : x
  2. Step 2: Convert to fraction form
    18,923.68/26,101.20 = 12,955.60/x
  3. Step 3: Cross multiply
    18,923.68x = 26,101.20 × 12,955.60
  4. Step 4: Simplify right side
    18,923.68x = 338,156,706.72
  5. Step 5: Solve for x
    x = 338,156,706.72/18,923.68
  6. Step 6: Final answer
    x = 17,869.50

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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.