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Finding the Fourth Proportional to 28,099.63, 42,148.45 and 7,039.85

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Solution

The fourth proportional to 28,099.63, 42,148.45 and 7,039.85 is: 10,559.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,099.63 : 42,148.45 = 7,039.85 : x
  2. Step 2: Convert to fraction form
    28,099.63/42,148.45 = 7,039.85/x
  3. Step 3: Cross multiply
    28,099.63x = 42,148.45 × 7,039.85
  4. Step 4: Simplify right side
    28,099.63x = 296,718,563.79
  5. Step 5: Solve for x
    x = 296,718,563.79/28,099.63
  6. Step 6: Final answer
    x = 10,559.52

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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.