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Finding the Fourth Proportional to 18,854.64, 28,252.80 and 13,900.68

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Solution

The fourth proportional to 18,854.64, 28,252.80 and 13,900.68 is: 20,829.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.64 : 28,252.80 = 13,900.68 : x
  2. Step 2: Convert to fraction form
    18,854.64/28,252.80 = 13,900.68/x
  3. Step 3: Cross multiply
    18,854.64x = 28,252.80 × 13,900.68
  4. Step 4: Simplify right side
    18,854.64x = 392,733,131.90
  5. Step 5: Solve for x
    x = 392,733,131.90/18,854.64
  6. Step 6: Final answer
    x = 20,829.52

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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.