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Finding the Fourth Proportional to 15,879.60, 23,819.28 and 6,639.12

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Solution

The fourth proportional to 15,879.60, 23,819.28 and 6,639.12 is: 9,958.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.60 : 23,819.28 = 6,639.12 : x
  2. Step 2: Convert to fraction form
    15,879.60/23,819.28 = 6,639.12/x
  3. Step 3: Cross multiply
    15,879.60x = 23,819.28 × 6,639.12
  4. Step 4: Simplify right side
    15,879.60x = 158,139,058.23
  5. Step 5: Solve for x
    x = 158,139,058.23/15,879.60
  6. Step 6: Final answer
    x = 9,958.63

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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.