Home / 21,237.64-31,829.10-8,742.64

Finding the Fourth Proportional to 21,237.64, 31,829.10 and 8,742.64

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Solution

The fourth proportional to 21,237.64, 31,829.10 and 8,742.64 is: 13,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.64 : 31,829.10 = 8,742.64 : x
  2. Step 2: Convert to fraction form
    21,237.64/31,829.10 = 8,742.64/x
  3. Step 3: Cross multiply
    21,237.64x = 31,829.10 × 8,742.64
  4. Step 4: Simplify right side
    21,237.64x = 278,270,362.82
  5. Step 5: Solve for x
    x = 278,270,362.82/21,237.64
  6. Step 6: Final answer
    x = 13,102.70

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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.