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Finding the Fourth Proportional to 12,458.21, 18,689.89 and 5,880.80

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Solution

The fourth proportional to 12,458.21, 18,689.89 and 5,880.80 is: 8,822.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,458.21 : 18,689.89 = 5,880.80 : x
  2. Step 2: Convert to fraction form
    12,458.21/18,689.89 = 5,880.80/x
  3. Step 3: Cross multiply
    12,458.21x = 18,689.89 × 5,880.80
  4. Step 4: Simplify right side
    12,458.21x = 109,911,548.16
  5. Step 5: Solve for x
    x = 109,911,548.16/12,458.21
  6. Step 6: Final answer
    x = 8,822.42

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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.