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Finding the Fourth Proportional to 18,855.64, 28,254.30 and 13,901.68

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Solution

The fourth proportional to 18,855.64, 28,254.30 and 13,901.68 is: 20,831.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.64 : 28,254.30 = 13,901.68 : x
  2. Step 2: Convert to fraction form
    18,855.64/28,254.30 = 13,901.68/x
  3. Step 3: Cross multiply
    18,855.64x = 28,254.30 × 13,901.68
  4. Step 4: Simplify right side
    18,855.64x = 392,782,237.22
  5. Step 5: Solve for x
    x = 392,782,237.22/18,855.64
  6. Step 6: Final answer
    x = 20,831.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.