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Finding the Fourth Proportional to 28,085.40, 42,114.60 and 8,357.04

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Solution

The fourth proportional to 28,085.40, 42,114.60 and 8,357.04 is: 12,531.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.40 : 42,114.60 = 8,357.04 : x
  2. Step 2: Convert to fraction form
    28,085.40/42,114.60 = 8,357.04/x
  3. Step 3: Cross multiply
    28,085.40x = 42,114.60 × 8,357.04
  4. Step 4: Simplify right side
    28,085.40x = 351,953,396.78
  5. Step 5: Solve for x
    x = 351,953,396.78/28,085.40
  6. Step 6: Final answer
    x = 12,531.54

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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.