Home / 15,573.31-21,491.26-8,499.78

Finding the Fourth Proportional to 15,573.31, 21,491.26 and 8,499.78

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Solution

The fourth proportional to 15,573.31, 21,491.26 and 8,499.78 is: 11,729.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.31 : 21,491.26 = 8,499.78 : x
  2. Step 2: Convert to fraction form
    15,573.31/21,491.26 = 8,499.78/x
  3. Step 3: Cross multiply
    15,573.31x = 21,491.26 × 8,499.78
  4. Step 4: Simplify right side
    15,573.31x = 182,670,960.67
  5. Step 5: Solve for x
    x = 182,670,960.67/15,573.31
  6. Step 6: Final answer
    x = 11,729.75

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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.