Home / 21,215.39-31,804.20-10,671.62

Finding the Fourth Proportional to 21,215.39, 31,804.20 and 10,671.62

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Solution

The fourth proportional to 21,215.39, 31,804.20 and 10,671.62 is: 15,997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.39 : 31,804.20 = 10,671.62 : x
  2. Step 2: Convert to fraction form
    21,215.39/31,804.20 = 10,671.62/x
  3. Step 3: Cross multiply
    21,215.39x = 31,804.20 × 10,671.62
  4. Step 4: Simplify right side
    21,215.39x = 339,402,177.78
  5. Step 5: Solve for x
    x = 339,402,177.78/21,215.39
  6. Step 6: Final answer
    x = 15,997.93

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1.5x scale

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.