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Finding the Fourth Proportional to 15,573.11, 21,491.01 and 8,499.69

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Solution

The fourth proportional to 15,573.11, 21,491.01 and 8,499.69 is: 11,729.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.11 : 21,491.01 = 8,499.69 : x
  2. Step 2: Convert to fraction form
    15,573.11/21,491.01 = 8,499.69/x
  3. Step 3: Cross multiply
    15,573.11x = 21,491.01 × 8,499.69
  4. Step 4: Simplify right side
    15,573.11x = 182,666,922.79
  5. Step 5: Solve for x
    x = 182,666,922.79/15,573.11
  6. Step 6: Final answer
    x = 11,729.64

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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.