Home / 15,385.32-21,234.78-9,012.60

Finding the Fourth Proportional to 15,385.32, 21,234.78 and 9,012.60

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Solution

The fourth proportional to 15,385.32, 21,234.78 and 9,012.60 is: 12,439.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.32 : 21,234.78 = 9,012.60 : x
  2. Step 2: Convert to fraction form
    15,385.32/21,234.78 = 9,012.60/x
  3. Step 3: Cross multiply
    15,385.32x = 21,234.78 × 9,012.60
  4. Step 4: Simplify right side
    15,385.32x = 191,380,578.23
  5. Step 5: Solve for x
    x = 191,380,578.23/15,385.32
  6. Step 6: Final answer
    x = 12,439.17

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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.