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Finding the Fourth Proportional to 18,447.66, 25,479.02 and 13,434.30

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Solution

The fourth proportional to 18,447.66, 25,479.02 and 13,434.30 is: 18,554.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,447.66 : 25,479.02 = 13,434.30 : x
  2. Step 2: Convert to fraction form
    18,447.66/25,479.02 = 13,434.30/x
  3. Step 3: Cross multiply
    18,447.66x = 25,479.02 × 13,434.30
  4. Step 4: Simplify right side
    18,447.66x = 342,292,798.39
  5. Step 5: Solve for x
    x = 342,292,798.39/18,447.66
  6. Step 6: Final answer
    x = 18,554.81

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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.