Home / 21,681.37-29,918.16-12,731.07

Finding the Fourth Proportional to 21,681.37, 29,918.16 and 12,731.07

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Solution

The fourth proportional to 21,681.37, 29,918.16 and 12,731.07 is: 17,567.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.37 : 29,918.16 = 12,731.07 : x
  2. Step 2: Convert to fraction form
    21,681.37/29,918.16 = 12,731.07/x
  3. Step 3: Cross multiply
    21,681.37x = 29,918.16 × 12,731.07
  4. Step 4: Simplify right side
    21,681.37x = 380,890,301.42
  5. Step 5: Solve for x
    x = 380,890,301.42/21,681.37
  6. Step 6: Final answer
    x = 17,567.63

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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.