Home / 21,157.74-31,758.94-20,681.16

Finding the Fourth Proportional to 21,157.74, 31,758.94 and 20,681.16

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Solution

The fourth proportional to 21,157.74, 31,758.94 and 20,681.16 is: 31,043.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.74 : 31,758.94 = 20,681.16 : x
  2. Step 2: Convert to fraction form
    21,157.74/31,758.94 = 20,681.16/x
  3. Step 3: Cross multiply
    21,157.74x = 31,758.94 × 20,681.16
  4. Step 4: Simplify right side
    21,157.74x = 656,811,719.57
  5. Step 5: Solve for x
    x = 656,811,719.57/21,157.74
  6. Step 6: Final answer
    x = 31,043.57

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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.