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Finding the Fourth Proportional to 19,012.56, 28,520 and 7,325.80

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Solution

The fourth proportional to 19,012.56, 28,520 and 7,325.80 is: 10,989.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,012.56 : 28,520 = 7,325.80 : x
  2. Step 2: Convert to fraction form
    19,012.56/28,520 = 7,325.80/x
  3. Step 3: Cross multiply
    19,012.56x = 28,520 × 7,325.80
  4. Step 4: Simplify right side
    19,012.56x = 208,931,816
  5. Step 5: Solve for x
    x = 208,931,816/19,012.56
  6. Step 6: Final answer
    x = 10,989.15

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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.