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Finding the Fourth Proportional to 28,125.65, 42,188.49 and 8,403.57

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Solution

The fourth proportional to 28,125.65, 42,188.49 and 8,403.57 is: 12,605.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.65 : 42,188.49 = 8,403.57 : x
  2. Step 2: Convert to fraction form
    28,125.65/42,188.49 = 8,403.57/x
  3. Step 3: Cross multiply
    28,125.65x = 42,188.49 × 8,403.57
  4. Step 4: Simplify right side
    28,125.65x = 354,533,928.91
  5. Step 5: Solve for x
    x = 354,533,928.91/28,125.65
  6. Step 6: Final answer
    x = 12,605.36

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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.