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Finding the Fourth Proportional to 28,012.50, 42,019.56 and 7,236

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Solution

The fourth proportional to 28,012.50, 42,019.56 and 7,236 is: 10,854.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,012.50 : 42,019.56 = 7,236 : x
  2. Step 2: Convert to fraction form
    28,012.50/42,019.56 = 7,236/x
  3. Step 3: Cross multiply
    28,012.50x = 42,019.56 × 7,236
  4. Step 4: Simplify right side
    28,012.50x = 304,053,536.16
  5. Step 5: Solve for x
    x = 304,053,536.16/28,012.50
  6. Step 6: Final answer
    x = 10,854.21

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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.