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Finding the Fourth Proportional to 28,362.45, 42,549.81 and 8,640.48

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Solution

The fourth proportional to 28,362.45, 42,549.81 and 8,640.48 is: 12,962.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.45 : 42,549.81 = 8,640.48 : x
  2. Step 2: Convert to fraction form
    28,362.45/42,549.81 = 8,640.48/x
  3. Step 3: Cross multiply
    28,362.45x = 42,549.81 × 8,640.48
  4. Step 4: Simplify right side
    28,362.45x = 367,650,782.31
  5. Step 5: Solve for x
    x = 367,650,782.31/28,362.45
  6. Step 6: Final answer
    x = 12,962.59

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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.