Home / 21,540.64-32,291.40-7,686.40

Finding the Fourth Proportional to 21,540.64, 32,291.40 and 7,686.40

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Solution

The fourth proportional to 21,540.64, 32,291.40 and 7,686.40 is: 11,522.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.64 : 32,291.40 = 7,686.40 : x
  2. Step 2: Convert to fraction form
    21,540.64/32,291.40 = 7,686.40/x
  3. Step 3: Cross multiply
    21,540.64x = 32,291.40 × 7,686.40
  4. Step 4: Simplify right side
    21,540.64x = 248,204,616.96
  5. Step 5: Solve for x
    x = 248,204,616.96/21,540.64
  6. Step 6: Final answer
    x = 11,522.62

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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.