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Finding the Fourth Proportional to 15,507.96, 21,403.06 and 8,796.02

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Solution

The fourth proportional to 15,507.96, 21,403.06 and 8,796.02 is: 12,139.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507.96 : 21,403.06 = 8,796.02 : x
  2. Step 2: Convert to fraction form
    15,507.96/21,403.06 = 8,796.02/x
  3. Step 3: Cross multiply
    15,507.96x = 21,403.06 × 8,796.02
  4. Step 4: Simplify right side
    15,507.96x = 188,261,743.82
  5. Step 5: Solve for x
    x = 188,261,743.82/15,507.96
  6. Step 6: Final answer
    x = 12,139.68

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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.