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Finding the Fourth Proportional to 18,465.21, 25,479.90 and 10,397.61

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Solution

The fourth proportional to 18,465.21, 25,479.90 and 10,397.61 is: 14,347.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,465.21 : 25,479.90 = 10,397.61 : x
  2. Step 2: Convert to fraction form
    18,465.21/25,479.90 = 10,397.61/x
  3. Step 3: Cross multiply
    18,465.21x = 25,479.90 × 10,397.61
  4. Step 4: Simplify right side
    18,465.21x = 264,930,063.04
  5. Step 5: Solve for x
    x = 264,930,063.04/18,465.21
  6. Step 6: Final answer
    x = 14,347.53

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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.