Home / 15,512.54-21,407.84-8,439.21

Finding the Fourth Proportional to 15,512.54, 21,407.84 and 8,439.21

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Solution

The fourth proportional to 15,512.54, 21,407.84 and 8,439.21 is: 11,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.54 : 21,407.84 = 8,439.21 : x
  2. Step 2: Convert to fraction form
    15,512.54/21,407.84 = 8,439.21/x
  3. Step 3: Cross multiply
    15,512.54x = 21,407.84 × 8,439.21
  4. Step 4: Simplify right side
    15,512.54x = 180,665,215.21
  5. Step 5: Solve for x
    x = 180,665,215.21/15,512.54
  6. Step 6: Final answer
    x = 11,646.40

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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.