Home / 15,105.56-20,844.15-8,821.58

Finding the Fourth Proportional to 15,105.56, 20,844.15 and 8,821.58

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Solution

The fourth proportional to 15,105.56, 20,844.15 and 8,821.58 is: 12,172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.56 : 20,844.15 = 8,821.58 : x
  2. Step 2: Convert to fraction form
    15,105.56/20,844.15 = 8,821.58/x
  3. Step 3: Cross multiply
    15,105.56x = 20,844.15 × 8,821.58
  4. Step 4: Simplify right side
    15,105.56x = 183,878,336.76
  5. Step 5: Solve for x
    x = 183,878,336.76/15,105.56
  6. Step 6: Final answer
    x = 12,172.89

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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.