Home / 15,172.20-20,937.32-8,457.80

Finding the Fourth Proportional to 15,172.20, 20,937.32 and 8,457.80

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Solution

The fourth proportional to 15,172.20, 20,937.32 and 8,457.80 is: 11,671.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.20 : 20,937.32 = 8,457.80 : x
  2. Step 2: Convert to fraction form
    15,172.20/20,937.32 = 8,457.80/x
  3. Step 3: Cross multiply
    15,172.20x = 20,937.32 × 8,457.80
  4. Step 4: Simplify right side
    15,172.20x = 177,083,665.10
  5. Step 5: Solve for x
    x = 177,083,665.10/15,172.20
  6. Step 6: Final answer
    x = 11,671.59

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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.