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Finding the Fourth Proportional to 21,043.86, 31,558.92 and 7,000.11

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Solution

The fourth proportional to 21,043.86, 31,558.92 and 7,000.11 is: 10,497.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.86 : 31,558.92 = 7,000.11 : x
  2. Step 2: Convert to fraction form
    21,043.86/31,558.92 = 7,000.11/x
  3. Step 3: Cross multiply
    21,043.86x = 31,558.92 × 7,000.11
  4. Step 4: Simplify right side
    21,043.86x = 220,915,911.48
  5. Step 5: Solve for x
    x = 220,915,911.48/21,043.86
  6. Step 6: Final answer
    x = 10,497.88

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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.