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Finding the Fourth Proportional to 15,913.99, 23,885.57 and 8,128.27

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Solution

The fourth proportional to 15,913.99, 23,885.57 and 8,128.27 is: 12,199.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,913.99 : 23,885.57 = 8,128.27 : x
  2. Step 2: Convert to fraction form
    15,913.99/23,885.57 = 8,128.27/x
  3. Step 3: Cross multiply
    15,913.99x = 23,885.57 × 8,128.27
  4. Step 4: Simplify right side
    15,913.99x = 194,148,362.06
  5. Step 5: Solve for x
    x = 194,148,362.06/15,913.99
  6. Step 6: Final answer
    x = 12,199.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.