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Finding the Fourth Proportional to 15,599.99, 21,538.31 and 9,640.42

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Solution

The fourth proportional to 15,599.99, 21,538.31 and 9,640.42 is: 13,310.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,599.99 : 21,538.31 = 9,640.42 : x
  2. Step 2: Convert to fraction form
    15,599.99/21,538.31 = 9,640.42/x
  3. Step 3: Cross multiply
    15,599.99x = 21,538.31 × 9,640.42
  4. Step 4: Simplify right side
    15,599.99x = 207,638,252.44
  5. Step 5: Solve for x
    x = 207,638,252.44/15,599.99
  6. Step 6: Final answer
    x = 13,310.15

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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.