Home / 15,438.63-21,305.22-8,724.36

Finding the Fourth Proportional to 15,438.63, 21,305.22 and 8,724.36

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Solution

The fourth proportional to 15,438.63, 21,305.22 and 8,724.36 is: 12,039.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.63 : 21,305.22 = 8,724.36 : x
  2. Step 2: Convert to fraction form
    15,438.63/21,305.22 = 8,724.36/x
  3. Step 3: Cross multiply
    15,438.63x = 21,305.22 × 8,724.36
  4. Step 4: Simplify right side
    15,438.63x = 185,874,409.16
  5. Step 5: Solve for x
    x = 185,874,409.16/15,438.63
  6. Step 6: Final answer
    x = 12,039.57

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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.