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Finding the Fourth Proportional to 11,525.50, 15,905.03 and 6,490.21

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Solution

The fourth proportional to 11,525.50, 15,905.03 and 6,490.21 is: 8,956.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,525.50 : 15,905.03 = 6,490.21 : x
  2. Step 2: Convert to fraction form
    11,525.50/15,905.03 = 6,490.21/x
  3. Step 3: Cross multiply
    11,525.50x = 15,905.03 × 6,490.21
  4. Step 4: Simplify right side
    11,525.50x = 103,227,064.23
  5. Step 5: Solve for x
    x = 103,227,064.23/11,525.50
  6. Step 6: Final answer
    x = 8,956.41

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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.