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Finding the Fourth Proportional to 15,625.53, 21,563.08 and 8,455.29

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Solution

The fourth proportional to 15,625.53, 21,563.08 and 8,455.29 is: 11,668.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,625.53 : 21,563.08 = 8,455.29 : x
  2. Step 2: Convert to fraction form
    15,625.53/21,563.08 = 8,455.29/x
  3. Step 3: Cross multiply
    15,625.53x = 21,563.08 × 8,455.29
  4. Step 4: Simplify right side
    15,625.53x = 182,322,094.69
  5. Step 5: Solve for x
    x = 182,322,094.69/15,625.53
  6. Step 6: Final answer
    x = 11,668.22

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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.