Home / 15,478.92-21,360.57-8,405.34

Finding the Fourth Proportional to 15,478.92, 21,360.57 and 8,405.34

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Solution

The fourth proportional to 15,478.92, 21,360.57 and 8,405.34 is: 11,599.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.92 : 21,360.57 = 8,405.34 : x
  2. Step 2: Convert to fraction form
    15,478.92/21,360.57 = 8,405.34/x
  3. Step 3: Cross multiply
    15,478.92x = 21,360.57 × 8,405.34
  4. Step 4: Simplify right side
    15,478.92x = 179,542,853.44
  5. Step 5: Solve for x
    x = 179,542,853.44/15,478.92
  6. Step 6: Final answer
    x = 11,599.18

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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.