Home / 21,109.64-31,673.18-9,257.28

Finding the Fourth Proportional to 21,109.64, 31,673.18 and 9,257.28

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Solution

The fourth proportional to 21,109.64, 31,673.18 and 9,257.28 is: 13,889.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.64 : 31,673.18 = 9,257.28 : x
  2. Step 2: Convert to fraction form
    21,109.64/31,673.18 = 9,257.28/x
  3. Step 3: Cross multiply
    21,109.64x = 31,673.18 × 9,257.28
  4. Step 4: Simplify right side
    21,109.64x = 293,207,291.10
  5. Step 5: Solve for x
    x = 293,207,291.10/21,109.64
  6. Step 6: Final answer
    x = 13,889.74

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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.