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Finding the Fourth Proportional to 15,573.64, 21,491.39 and 8,499.59

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Solution

The fourth proportional to 15,573.64, 21,491.39 and 8,499.59 is: 11,729.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.64 : 21,491.39 = 8,499.59 : x
  2. Step 2: Convert to fraction form
    15,573.64/21,491.39 = 8,499.59/x
  3. Step 3: Cross multiply
    15,573.64x = 21,491.39 × 8,499.59
  4. Step 4: Simplify right side
    15,573.64x = 182,668,078.51
  5. Step 5: Solve for x
    x = 182,668,078.51/15,573.64
  6. Step 6: Final answer
    x = 11,729.31

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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.