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Finding the Fourth Proportional to 15,644.76, 21,599.10 and 13,895.16

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Solution

The fourth proportional to 15,644.76, 21,599.10 and 13,895.16 is: 19,183.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,644.76 : 21,599.10 = 13,895.16 : x
  2. Step 2: Convert to fraction form
    15,644.76/21,599.10 = 13,895.16/x
  3. Step 3: Cross multiply
    15,644.76x = 21,599.10 × 13,895.16
  4. Step 4: Simplify right side
    15,644.76x = 300,122,950.36
  5. Step 5: Solve for x
    x = 300,122,950.36/15,644.76
  6. Step 6: Final answer
    x = 19,183.61

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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.