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Finding the Fourth Proportional to 28,900.12, 39,882.02 and 15,652.12

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Solution

The fourth proportional to 28,900.12, 39,882.02 and 15,652.12 is: 21,599.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,900.12 : 39,882.02 = 15,652.12 : x
  2. Step 2: Convert to fraction form
    28,900.12/39,882.02 = 15,652.12/x
  3. Step 3: Cross multiply
    28,900.12x = 39,882.02 × 15,652.12
  4. Step 4: Simplify right side
    28,900.12x = 624,238,162.88
  5. Step 5: Solve for x
    x = 624,238,162.88/28,900.12
  6. Step 6: Final answer
    x = 21,599.85

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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.