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Finding the Fourth Proportional to 15,573.57, 21,491.31 and 8,499.87

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Solution

The fourth proportional to 15,573.57, 21,491.31 and 8,499.87 is: 11,729.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.57 : 21,491.31 = 8,499.87 : x
  2. Step 2: Convert to fraction form
    15,573.57/21,491.31 = 8,499.87/x
  3. Step 3: Cross multiply
    15,573.57x = 21,491.31 × 8,499.87
  4. Step 4: Simplify right side
    15,573.57x = 182,673,341.13
  5. Step 5: Solve for x
    x = 182,673,341.13/15,573.57
  6. Step 6: Final answer
    x = 11,729.70

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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.