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Finding the Fourth Proportional to 10,172.80, 15,226.80 and 7,256.80

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Solution

The fourth proportional to 10,172.80, 15,226.80 and 7,256.80 is: 10,862.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,172.80 : 15,226.80 = 7,256.80 : x
  2. Step 2: Convert to fraction form
    10,172.80/15,226.80 = 7,256.80/x
  3. Step 3: Cross multiply
    10,172.80x = 15,226.80 × 7,256.80
  4. Step 4: Simplify right side
    10,172.80x = 110,497,842.24
  5. Step 5: Solve for x
    x = 110,497,842.24/10,172.80
  6. Step 6: Final answer
    x = 10,862.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.