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Finding the Fourth Proportional to 19,012.56, 28,523.72 and 7,915.56

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Solution

The fourth proportional to 19,012.56, 28,523.72 and 7,915.56 is: 11,875.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,012.56 : 28,523.72 = 7,915.56 : x
  2. Step 2: Convert to fraction form
    19,012.56/28,523.72 = 7,915.56/x
  3. Step 3: Cross multiply
    19,012.56x = 28,523.72 × 7,915.56
  4. Step 4: Simplify right side
    19,012.56x = 225,781,217.08
  5. Step 5: Solve for x
    x = 225,781,217.08/19,012.56
  6. Step 6: Final answer
    x = 11,875.37

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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.