Home / 15,487.22-21,372.12-8,772.80

Finding the Fourth Proportional to 15,487.22, 21,372.12 and 8,772.80

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Solution

The fourth proportional to 15,487.22, 21,372.12 and 8,772.80 is: 12,106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.22 : 21,372.12 = 8,772.80 : x
  2. Step 2: Convert to fraction form
    15,487.22/21,372.12 = 8,772.80/x
  3. Step 3: Cross multiply
    15,487.22x = 21,372.12 × 8,772.80
  4. Step 4: Simplify right side
    15,487.22x = 187,493,227.48
  5. Step 5: Solve for x
    x = 187,493,227.48/15,487.22
  6. Step 6: Final answer
    x = 12,106.32

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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.