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Finding the Fourth Proportional to 28,500.50, 42,750.77 and 7,724

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Solution

The fourth proportional to 28,500.50, 42,750.77 and 7,724 is: 11,586.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,500.50 : 42,750.77 = 7,724 : x
  2. Step 2: Convert to fraction form
    28,500.50/42,750.77 = 7,724/x
  3. Step 3: Cross multiply
    28,500.50x = 42,750.77 × 7,724
  4. Step 4: Simplify right side
    28,500.50x = 330,206,947.48
  5. Step 5: Solve for x
    x = 330,206,947.48/28,500.50
  6. Step 6: Final answer
    x = 11,586.01

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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.