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Finding the Fourth Proportional to 28,141.20, 42,205.52 and 8,417.20

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Solution

The fourth proportional to 28,141.20, 42,205.52 and 8,417.20 is: 12,623.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,141.20 : 42,205.52 = 8,417.20 : x
  2. Step 2: Convert to fraction form
    28,141.20/42,205.52 = 8,417.20/x
  3. Step 3: Cross multiply
    28,141.20x = 42,205.52 × 8,417.20
  4. Step 4: Simplify right side
    28,141.20x = 355,252,302.94
  5. Step 5: Solve for x
    x = 355,252,302.94/28,141.20
  6. Step 6: Final answer
    x = 12,623.92

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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.