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Finding the Fourth Proportional to 15,525.60, 21,424.68 and 8,451.60

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Solution

The fourth proportional to 15,525.60, 21,424.68 and 8,451.60 is: 11,662.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,525.60 : 21,424.68 = 8,451.60 : x
  2. Step 2: Convert to fraction form
    15,525.60/21,424.68 = 8,451.60/x
  3. Step 3: Cross multiply
    15,525.60x = 21,424.68 × 8,451.60
  4. Step 4: Simplify right side
    15,525.60x = 181,072,825.49
  5. Step 5: Solve for x
    x = 181,072,825.49/15,525.60
  6. Step 6: Final answer
    x = 11,662.86

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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.