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Finding the Fourth Proportional to 15,873.41, 21,900.87 and 12,505.79

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Solution

The fourth proportional to 15,873.41, 21,900.87 and 12,505.79 is: 17,254.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,873.41 : 21,900.87 = 12,505.79 : x
  2. Step 2: Convert to fraction form
    15,873.41/21,900.87 = 12,505.79/x
  3. Step 3: Cross multiply
    15,873.41x = 21,900.87 × 12,505.79
  4. Step 4: Simplify right side
    15,873.41x = 273,887,571.53
  5. Step 5: Solve for x
    x = 273,887,571.53/15,873.41
  6. Step 6: Final answer
    x = 17,254.49

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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.