Home / 21,129.04-31,671.12-7,975.84

Finding the Fourth Proportional to 21,129.04, 31,671.12 and 7,975.84

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Solution

The fourth proportional to 21,129.04, 31,671.12 and 7,975.84 is: 11,955.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.04 : 31,671.12 = 7,975.84 : x
  2. Step 2: Convert to fraction form
    21,129.04/31,671.12 = 7,975.84/x
  3. Step 3: Cross multiply
    21,129.04x = 31,671.12 × 7,975.84
  4. Step 4: Simplify right side
    21,129.04x = 252,603,785.74
  5. Step 5: Solve for x
    x = 252,603,785.74/21,129.04
  6. Step 6: Final answer
    x = 11,955.29

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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.