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Finding the Fourth Proportional to 28,039.77, 42,053.19 and 8,313.57

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Solution

The fourth proportional to 28,039.77, 42,053.19 and 8,313.57 is: 12,468.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,039.77 : 42,053.19 = 8,313.57 : x
  2. Step 2: Convert to fraction form
    28,039.77/42,053.19 = 8,313.57/x
  3. Step 3: Cross multiply
    28,039.77x = 42,053.19 × 8,313.57
  4. Step 4: Simplify right side
    28,039.77x = 349,612,138.79
  5. Step 5: Solve for x
    x = 349,612,138.79/28,039.77
  6. Step 6: Final answer
    x = 12,468.44

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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.