Home / 21,256.81-31,857.51-13,248.28

Finding the Fourth Proportional to 21,256.81, 31,857.51 and 13,248.28

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Solution

The fourth proportional to 21,256.81, 31,857.51 and 13,248.28 is: 19,855.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.81 : 31,857.51 = 13,248.28 : x
  2. Step 2: Convert to fraction form
    21,256.81/31,857.51 = 13,248.28/x
  3. Step 3: Cross multiply
    21,256.81x = 31,857.51 × 13,248.28
  4. Step 4: Simplify right side
    21,256.81x = 422,057,212.58
  5. Step 5: Solve for x
    x = 422,057,212.58/21,256.81
  6. Step 6: Final answer
    x = 19,855.15

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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.