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Finding the Fourth Proportional to 28,439.52, 42,682.08 and 12,858.48

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Solution

The fourth proportional to 28,439.52, 42,682.08 and 12,858.48 is: 19,298.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.52 : 42,682.08 = 12,858.48 : x
  2. Step 2: Convert to fraction form
    28,439.52/42,682.08 = 12,858.48/x
  3. Step 3: Cross multiply
    28,439.52x = 42,682.08 × 12,858.48
  4. Step 4: Simplify right side
    28,439.52x = 548,826,672.04
  5. Step 5: Solve for x
    x = 548,826,672.04/28,439.52
  6. Step 6: Final answer
    x = 19,298.03

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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.