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Finding the Fourth Proportional to 15,868.80, 21,900.24 and 8,797.50

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Solution

The fourth proportional to 15,868.80, 21,900.24 and 8,797.50 is: 12,141.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.80 : 21,900.24 = 8,797.50 : x
  2. Step 2: Convert to fraction form
    15,868.80/21,900.24 = 8,797.50/x
  3. Step 3: Cross multiply
    15,868.80x = 21,900.24 × 8,797.50
  4. Step 4: Simplify right side
    15,868.80x = 192,667,361.40
  5. Step 5: Solve for x
    x = 192,667,361.40/15,868.80
  6. Step 6: Final answer
    x = 12,141.27

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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.