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Finding the Fourth Proportional to 28,125.30, 42,188.45 and 8,404.10

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Solution

The fourth proportional to 28,125.30, 42,188.45 and 8,404.10 is: 12,606.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.30 : 42,188.45 = 8,404.10 : x
  2. Step 2: Convert to fraction form
    28,125.30/42,188.45 = 8,404.10/x
  3. Step 3: Cross multiply
    28,125.30x = 42,188.45 × 8,404.10
  4. Step 4: Simplify right side
    28,125.30x = 354,555,952.65
  5. Step 5: Solve for x
    x = 354,555,952.65/28,125.30
  6. Step 6: Final answer
    x = 12,606.30

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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.