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Finding the Fourth Proportional to 18,458.64, 25,479 and 14,688.72

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Solution

The fourth proportional to 18,458.64, 25,479 and 14,688.72 is: 20,275.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.64 : 25,479 = 14,688.72 : x
  2. Step 2: Convert to fraction form
    18,458.64/25,479 = 14,688.72/x
  3. Step 3: Cross multiply
    18,458.64x = 25,479 × 14,688.72
  4. Step 4: Simplify right side
    18,458.64x = 374,253,896.88
  5. Step 5: Solve for x
    x = 374,253,896.88/18,458.64
  6. Step 6: Final answer
    x = 20,275.27

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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.