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Finding the Fourth Proportional to 12,423.63, 17,150.90 and 7,890.87

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Solution

The fourth proportional to 12,423.63, 17,150.90 and 7,890.87 is: 10,893.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.63 : 17,150.90 = 7,890.87 : x
  2. Step 2: Convert to fraction form
    12,423.63/17,150.90 = 7,890.87/x
  3. Step 3: Cross multiply
    12,423.63x = 17,150.90 × 7,890.87
  4. Step 4: Simplify right side
    12,423.63x = 135,335,522.28
  5. Step 5: Solve for x
    x = 135,335,522.28/12,423.63
  6. Step 6: Final answer
    x = 10,893.40

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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.