Home / 15,781.44-21,777.12-9,066.72

Finding the Fourth Proportional to 15,781.44, 21,777.12 and 9,066.72

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Solution

The fourth proportional to 15,781.44, 21,777.12 and 9,066.72 is: 12,511.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.44 : 21,777.12 = 9,066.72 : x
  2. Step 2: Convert to fraction form
    15,781.44/21,777.12 = 9,066.72/x
  3. Step 3: Cross multiply
    15,781.44x = 21,777.12 × 9,066.72
  4. Step 4: Simplify right side
    15,781.44x = 197,447,049.45
  5. Step 5: Solve for x
    x = 197,447,049.45/15,781.44
  6. Step 6: Final answer
    x = 12,511.35

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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.