Home / 21,355.56-31,986.54-17,615.64

Finding the Fourth Proportional to 21,355.56, 31,986.54 and 17,615.64

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Solution

The fourth proportional to 21,355.56, 31,986.54 and 17,615.64 is: 26,384.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.56 : 31,986.54 = 17,615.64 : x
  2. Step 2: Convert to fraction form
    21,355.56/31,986.54 = 17,615.64/x
  3. Step 3: Cross multiply
    21,355.56x = 31,986.54 × 17,615.64
  4. Step 4: Simplify right side
    21,355.56x = 563,463,373.49
  5. Step 5: Solve for x
    x = 563,463,373.49/21,355.56
  6. Step 6: Final answer
    x = 26,384.86

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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.