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Finding the Fourth Proportional to 28,822.50, 39,775.05 and 15,574.50

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Solution

The fourth proportional to 28,822.50, 39,775.05 and 15,574.50 is: 21,492.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,822.50 : 39,775.05 = 15,574.50 : x
  2. Step 2: Convert to fraction form
    28,822.50/39,775.05 = 15,574.50/x
  3. Step 3: Cross multiply
    28,822.50x = 39,775.05 × 15,574.50
  4. Step 4: Simplify right side
    28,822.50x = 619,476,516.23
  5. Step 5: Solve for x
    x = 619,476,516.23/28,822.50
  6. Step 6: Final answer
    x = 21,492.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.