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Finding the Fourth Proportional to 15,122.87, 20,871.83 and 10,887.95

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Solution

The fourth proportional to 15,122.87, 20,871.83 and 10,887.95 is: 15,027.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.87 : 20,871.83 = 10,887.95 : x
  2. Step 2: Convert to fraction form
    15,122.87/20,871.83 = 10,887.95/x
  3. Step 3: Cross multiply
    15,122.87x = 20,871.83 × 10,887.95
  4. Step 4: Simplify right side
    15,122.87x = 227,251,441.45
  5. Step 5: Solve for x
    x = 227,251,441.45/15,122.87
  6. Step 6: Final answer
    x = 15,027.00

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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.