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Finding the Fourth Proportional to 15,238.45, 21,025.87 and 8,947.45

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Solution

The fourth proportional to 15,238.45, 21,025.87 and 8,947.45 is: 12,345.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,238.45 : 21,025.87 = 8,947.45 : x
  2. Step 2: Convert to fraction form
    15,238.45/21,025.87 = 8,947.45/x
  3. Step 3: Cross multiply
    15,238.45x = 21,025.87 × 8,947.45
  4. Step 4: Simplify right side
    15,238.45x = 188,127,920.53
  5. Step 5: Solve for x
    x = 188,127,920.53/15,238.45
  6. Step 6: Final answer
    x = 12,345.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.