Home / 15,512.80-21,407.05-8,439.07

Finding the Fourth Proportional to 15,512.80, 21,407.05 and 8,439.07

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Solution

The fourth proportional to 15,512.80, 21,407.05 and 8,439.07 is: 11,645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.80 : 21,407.05 = 8,439.07 : x
  2. Step 2: Convert to fraction form
    15,512.80/21,407.05 = 8,439.07/x
  3. Step 3: Cross multiply
    15,512.80x = 21,407.05 × 8,439.07
  4. Step 4: Simplify right side
    15,512.80x = 180,655,593.44
  5. Step 5: Solve for x
    x = 180,655,593.44/15,512.80
  6. Step 6: Final answer
    x = 11,645.58

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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.