Home / 21,681.44-29,890.68-13,719.68

Finding the Fourth Proportional to 21,681.44, 29,890.68 and 13,719.68

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Solution

The fourth proportional to 21,681.44, 29,890.68 and 13,719.68 is: 18,914.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.44 : 29,890.68 = 13,719.68 : x
  2. Step 2: Convert to fraction form
    21,681.44/29,890.68 = 13,719.68/x
  3. Step 3: Cross multiply
    21,681.44x = 29,890.68 × 13,719.68
  4. Step 4: Simplify right side
    21,681.44x = 410,090,564.58
  5. Step 5: Solve for x
    x = 410,090,564.58/21,681.44
  6. Step 6: Final answer
    x = 18,914.36

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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.